diff --git a/src/main/java/com/sk89q/craftbook/util/ItemUtil.java b/src/main/java/com/sk89q/craftbook/util/ItemUtil.java
index 88f96494f..bb549c62b 100644
--- a/src/main/java/com/sk89q/craftbook/util/ItemUtil.java
+++ b/src/main/java/com/sk89q/craftbook/util/ItemUtil.java
@@ -748,6 +748,10 @@ public static boolean isAPotionIngredient(ItemStack item) {
             case PHANTOM_MEMBRANE:
             case DRAGON_BREATH:
             case TURTLE_HELMET:
+            case BREEZE_ROD:
+            case SLIME_BLOCK:
+            case COBWEB:
+            case STONE:
                 return true;
             default:
                 return false;