diff --git a/docx4j-core-tests/src/test/java/org/docx4j/wml/SdtPrTest.java b/docx4j-core-tests/src/test/java/org/docx4j/wml/SdtPrTest.java
new file mode 100644
index 0000000000..afc804a453
--- /dev/null
+++ b/docx4j-core-tests/src/test/java/org/docx4j/wml/SdtPrTest.java
@@ -0,0 +1,68 @@
+package org.docx4j.wml;
+
+import org.docx4j.XmlUtils;
+import org.docx4j.openpackaging.exceptions.InvalidFormatException;
+import org.junit.Assert;
+import org.junit.Test;
+
+import javax.xml.bind.JAXBElement;
+import javax.xml.bind.JAXBException;
+
+public class SdtPrTest {
+
+    /**
+     * Unmarshalling sets sdtcontentblock.getParent() correctly.
+     *
+     * @throws InvalidFormatException
+     * @throws JAXBException
+     */
+    @Test
+    public void testUnmarshallingAndMarshallingSdtContentBlock() throws InvalidFormatException, JAXBException {
+
+
+        String openXML = "<w:document mc:Ignorable=\"w14 wp14\" xmlns:cppr=\"http://schemas.microsoft.com/office/2006/coverPageProps\" xmlns:dgm1611=\"http://schemas.microsoft.com/office/drawing/2016/11/diagram\" xmlns:xdr=\"http://schemas.openxmlformats.org/drawingml/2006/spreadsheetDrawing\" xmlns:w16se=\"http://schemas.microsoft.com/office/word/2015/wordml/symex\" xmlns:wp15=\"http://schemas.microsoft.com/office/word/2012/wordprocessingDrawing\" xmlns:wp14=\"http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing\" xmlns:pic=\"http://schemas.openxmlformats.org/drawingml/2006/picture\" xmlns:a1611=\"http://schemas.microsoft.com/office/drawing/2016/11/main\" xmlns:a16svg=\"http://schemas.microsoft.com/office/drawing/2016/SVG/main\" xmlns:am3d=\"http://schemas.microsoft.com/office/drawing/2017/model3d\" xmlns:pvml=\"urn:schemas-microsoft-com:office:powerpoint\" xmlns:mc=\"http://schemas.openxmlformats.org/markup-compatibility/2006\" xmlns:dgm1612=\"http://schemas.microsoft.com/office/drawing/2016/12/diagram\" xmlns:comp=\"http://schemas.openxmlformats.org/drawingml/2006/compatibility\" xmlns:xvml=\"urn:schemas-microsoft-com:office:excel\" xmlns:c173=\"http://schemas.microsoft.com/office/drawing/2017/03/chart\" xmlns:anam3d=\"http://schemas.microsoft.com/office/drawing/2018/animation/model3d\" xmlns:wpc=\"http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas\" xmlns:adec=\"http://schemas.microsoft.com/office/drawing/2017/decorative\" xmlns:oda=\"http://opendope.org/answers\" xmlns:a18hc=\"http://schemas.microsoft.com/office/drawing/2018/hyperlinkcolor\" xmlns:odc=\"http://opendope.org/conditions\" xmlns:wpg=\"http://schemas.microsoft.com/office/word/2010/wordprocessingGroup\" xmlns:cdr=\"http://schemas.openxmlformats.org/drawingml/2006/chartDrawing\" xmlns:odi=\"http://opendope.org/components\" xmlns:msink=\"http://schemas.microsoft.com/ink/2010/main\" xmlns:cdr14=\"http://schemas.microsoft.com/office/drawing/2010/chartDrawing\" xmlns:iact=\"http://schemas.microsoft.com/office/powerpoint/2014/inkAction\" xmlns:an18=\"http://schemas.microsoft.com/office/drawing/2018/animation\" xmlns:wps=\"http://schemas.microsoft.com/office/word/2010/wordprocessingShape\" xmlns:odq=\"http://opendope.org/questions\" xmlns:w16cid=\"http://schemas.microsoft.com/office/word/2016/wordml/cid\" xmlns:dsp=\"http://schemas.microsoft.com/office/drawing/2008/diagram\" xmlns:odx=\"http://opendope.org/xpaths\" xmlns:a15=\"http://schemas.microsoft.com/office/drawing/2012/main\" xmlns:a14=\"http://schemas.microsoft.com/office/drawing/2010/main\" xmlns:c15=\"http://schemas.microsoft.com/office/drawing/2012/chart\" xmlns:a13cmd=\"http://schemas.microsoft.com/office/drawing/2013/main/command\" xmlns:c14=\"http://schemas.microsoft.com/office/drawing/2007/8/2/chart\" xmlns:a16=\"http://schemas.microsoft.com/office/drawing/2014/main\" xmlns:odgm=\"http://opendope.org/SmartArt/DataHierarchy\" xmlns:c16=\"http://schemas.microsoft.com/office/drawing/2014/chart\" xmlns:dgm=\"http://schemas.openxmlformats.org/drawingml/2006/diagram\" xmlns:thm15=\"http://schemas.microsoft.com/office/thememl/2012/main\" xmlns:we=\"http://schemas.microsoft.com/office/webextensions/webextension/2010/11\" xmlns:w10=\"urn:schemas-microsoft-com:office:word\" xmlns:ns39=\"http://www.w3.org/2003/InkML\" xmlns:wp=\"http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing\" xmlns:sl=\"http://schemas.openxmlformats.org/schemaLibrary/2006/main\" xmlns:ns38=\"http://www.w3.org/1998/Math/MathML\" xmlns:w15=\"http://schemas.microsoft.com/office/word/2012/wordml\" xmlns:w14=\"http://schemas.microsoft.com/office/word/2010/wordml\" xmlns:dgm14=\"http://schemas.microsoft.com/office/drawing/2010/diagram\" xmlns:c16ac=\"http://schemas.microsoft.com/office/drawing/2014/chart/ac\" xmlns:a=\"http://schemas.openxmlformats.org/drawingml/2006/main\" xmlns:b=\"http://schemas.openxmlformats.org/officeDocument/2006/bibliography\" xmlns:c=\"http://schemas.openxmlformats.org/drawingml/2006/chart\" xmlns:m=\"http://schemas.openxmlformats.org/officeDocument/2006/math\" xmlns:wne=\"http://schemas.microsoft.com/office/word/2006/wordml\" xmlns:o=\"urn:schemas-microsoft-com:office:office\" xmlns:cs=\"http://schemas.microsoft.com/office/drawing/2012/chartStyle\" xmlns:r=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\" xmlns:cx=\"http://schemas.microsoft.com/office/drawing/2014/chartex\" xmlns:v=\"urn:schemas-microsoft-com:vml\" xmlns:pic14=\"http://schemas.microsoft.com/office/drawing/2010/picture\" xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\" xmlns:lc=\"http://schemas.openxmlformats.org/drawingml/2006/lockedCanvas\" xmlns:wetp=\"http://schemas.microsoft.com/office/webextensions/taskpanes/2010/11\">"
+                + "<w:body>"
+                + "<w:sdt>" // SdtBlock
+                + "<w:sdtPr>"
+                + "<w:id w:val=\"23345677\"/>"
+                + "<w:label w:val=\"labelVal\"/>"
+                + "<w:alias w:val=\"aliasVal\"/>"
+                + "<w:tag w:val=\"99f2055c-5fac-41f7-9125-a7a3276f4291\"/>"
+                + "</w:sdtPr>"
+
+                + "<w:sdtContent>" // SdtContentBlock
+                + "<w:p>"
+                + "<w:r>"
+                + "<w:t>Some content</w:t>"
+                + "</w:r>"
+                + "</w:p>"
+                + "</w:sdtContent>"
+
+                + "</w:sdt>"
+                + "</w:body>"
+
+                + "</w:document>"
+                ;
+
+        Document document = (Document) XmlUtils.unmarshalString(openXML);
+
+
+        SdtBlock sdtblock = (SdtBlock)document.getContent().get(0);
+
+
+        Assert.assertTrue(sdtblock.sdtPr.rPrOrAliasOrLock.get(0) instanceof Id);
+        Assert.assertTrue(sdtblock.sdtPr.rPrOrAliasOrLock.get(1) instanceof JAXBElement);
+        Assert.assertTrue(sdtblock.sdtPr.rPrOrAliasOrLock.get(2) instanceof JAXBElement);
+        Assert.assertTrue(((JAXBElement)sdtblock.sdtPr.rPrOrAliasOrLock.get(1)).getValue() instanceof SdtPr.Label);
+        Assert.assertTrue(((JAXBElement)sdtblock.sdtPr.rPrOrAliasOrLock.get(2)).getValue() instanceof SdtPr.Alias);
+        Assert.assertTrue(sdtblock.sdtPr.rPrOrAliasOrLock.get(3) instanceof Tag);
+        Assert.assertEquals(23345677L, ((Id) sdtblock.sdtPr.rPrOrAliasOrLock.get(0)).val.longValue());
+        Assert.assertEquals("labelVal", ((SdtPr.Label) ((JAXBElement)sdtblock.sdtPr.rPrOrAliasOrLock.get(1)).getValue()).val);
+        Assert.assertEquals("aliasVal", ((SdtPr.Alias) ((JAXBElement)sdtblock.sdtPr.rPrOrAliasOrLock.get(2)).getValue()).val);
+
+
+        String res = XmlUtils.marshaltoString(document, true, false);
+        Assert.assertEquals(openXML, res);
+    }
+}
+
diff --git a/docx4j-openxml-objects/src/main/java/org/docx4j/wml/ObjectFactory.java b/docx4j-openxml-objects/src/main/java/org/docx4j/wml/ObjectFactory.java
index 0ddd417554..d53df431e9 100644
--- a/docx4j-openxml-objects/src/main/java/org/docx4j/wml/ObjectFactory.java
+++ b/docx4j-openxml-objects/src/main/java/org/docx4j/wml/ObjectFactory.java
@@ -144,6 +144,7 @@ public static ObjectFactory get() {
     private final static QName _CTTrPrBaseHidden_QNAME = new QName("http://schemas.openxmlformats.org/wordprocessingml/2006/main", "hidden");
     private final static QName _SdtPrRPr_QNAME = new QName("http://schemas.openxmlformats.org/wordprocessingml/2006/main", "rPr");
     private final static QName _SdtPrAlias_QNAME = new QName("http://schemas.openxmlformats.org/wordprocessingml/2006/main", "alias");
+    private final static QName _SdtPrLabel_QNAME = new QName("http://schemas.openxmlformats.org/wordprocessingml/2006/main", "label");
     private final static QName _SdtPrLock_QNAME = new QName("http://schemas.openxmlformats.org/wordprocessingml/2006/main", "lock");
     private final static QName _SdtPrPlaceholder_QNAME = new QName("http://schemas.openxmlformats.org/wordprocessingml/2006/main", "placeholder");
     private final static QName _SdtPrShowingPlcHdr_QNAME = new QName("http://schemas.openxmlformats.org/wordprocessingml/2006/main", "showingPlcHdr");
@@ -5737,6 +5738,15 @@ public JAXBElement<CTLock> createSdtPrLock(CTLock value) {
         return new JAXBElement<CTLock>(_SdtPrLock_QNAME, CTLock.class, SdtPr.class, value);
     }
 
+    /**
+     * Create an instance of {@link JAXBElement }{@code <}{@link SdtPr.Label }{@code >}}
+     *
+     */
+    @XmlElementDecl(namespace = "http://schemas.openxmlformats.org/wordprocessingml/2006/main", name = "label", scope = SdtPr.class)
+    public JAXBElement<SdtPr.Label> createSdtPrLabel(SdtPr.Label value) {
+        return new JAXBElement<SdtPr.Label>(_SdtPrLabel_QNAME, SdtPr.Label.class, SdtPr.class, value);
+    }
+
     /**
      * Create an instance of {@link JAXBElement }{@code <}{@link CTPlaceholder }{@code >}}
      * 
diff --git a/docx4j-openxml-objects/src/main/java/org/docx4j/wml/SdtPr.java b/docx4j-openxml-objects/src/main/java/org/docx4j/wml/SdtPr.java
index 1c3dc7ace3..ac9b830fc0 100644
--- a/docx4j-openxml-objects/src/main/java/org/docx4j/wml/SdtPr.java
+++ b/docx4j-openxml-objects/src/main/java/org/docx4j/wml/SdtPr.java
@@ -172,6 +172,7 @@ private static Object unwrap(Object o) {
         @XmlElementRef(name = "placeholder", namespace = "http://schemas.openxmlformats.org/wordprocessingml/2006/main", type = JAXBElement.class),
         @XmlElementRef(name = "dataBinding", namespace = "http://schemas.microsoft.com/office/word/2012/wordml", type = JAXBElement.class),
         @XmlElementRef(name = "alias", namespace = "http://schemas.openxmlformats.org/wordprocessingml/2006/main", type = JAXBElement.class),
+        @XmlElementRef(name = "label", namespace = "http://schemas.openxmlformats.org/wordprocessingml/2006/main", type = JAXBElement.class),
         @XmlElementRef(name = "checkbox", namespace = "http://schemas.microsoft.com/office/word/2010/wordml", type = JAXBElement.class),
         @XmlElementRef(name = "showingPlcHdr", namespace = "http://schemas.openxmlformats.org/wordprocessingml/2006/main", type = JAXBElement.class),
         @XmlElementRef(name = "webExtensionCreated", namespace = "http://schemas.microsoft.com/office/word/2012/wordml", type = JAXBElement.class),
@@ -225,6 +226,7 @@ private static Object unwrap(Object o) {
      * {@link JAXBElement }{@code <}{@link CTPlaceholder }{@code >}
      * {@link JAXBElement }{@code <}{@link CTDataBinding }{@code >}
      * {@link JAXBElement }{@code <}{@link SdtPr.Alias }{@code >}
+     * {@link JAXBElement }{@code <}{@link SdtPr.Label }{@code >}
      * {@link JAXBElement }{@code <}{@link CTSdtCheckbox }{@code >}
      * {@link JAXBElement }{@code <}{@link BooleanDefaultTrue }{@code >}
      * {@link JAXBElement }{@code <}{@link BooleanDefaultTrue }{@code >}
@@ -591,6 +593,87 @@ public void afterUnmarshal(Unmarshaller unmarshaller, Object parent) {
     }
 
 
+    /**
+     * <p>Java class for anonymous complex type.
+     *
+     * <p>The following schema fragment specifies the expected content contained within this class.
+     *
+     * <pre>
+     * &lt;complexType>
+     *   &lt;complexContent>
+     *     &lt;restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
+     *       &lt;attribute name="val" type="{http://www.w3.org/2001/XMLSchema}string" />
+     *     &lt;/restriction>
+     *   &lt;/complexContent>
+     * &lt;/complexType>
+     * </pre>
+     *
+     *
+     */
+    @XmlAccessorType(XmlAccessType.FIELD)
+    @XmlType(name = "")
+    @XmlRootElement(name = "label")
+    public static class Label
+        implements Child
+    {
+
+        @XmlAttribute(name = "val", namespace = "http://schemas.openxmlformats.org/wordprocessingml/2006/main")
+        protected String val;
+        @XmlTransient
+        private Object parent;
+
+        /**
+         * Gets the value of the val property.
+         *
+         * @return
+         *     possible object is
+         *     {@link String }
+         *
+         */
+        public String getVal() {
+            return val;
+        }
+
+        /**
+         * Sets the value of the val property.
+         *
+         * @param value
+         *     allowed object is
+         *     {@link String }
+         *
+         */
+        public void setVal(String value) {
+            this.val = value;
+        }
+
+        /**
+         * Gets the parent object in the object tree representing the unmarshalled xml document.
+         *
+         * @return
+         *     The parent object.
+         */
+        public Object getParent() {
+            return this.parent;
+        }
+
+        public void setParent(Object parent) {
+            this.parent = parent;
+        }
+
+        /**
+         * This method is invoked by the JAXB implementation on each instance when unmarshalling completes.
+         *
+         * @param parent
+         *     The parent object in the object tree.
+         * @param unmarshaller
+         *     The unmarshaller that generated the instance.
+         */
+        public void afterUnmarshal(Unmarshaller unmarshaller, Object parent) {
+            setParent(parent);
+        }
+
+    }
+
     /**
      * <p>Java class for anonymous complex type.
      *