diff --git a/bindings/Sofa/src/SofaPython3/Sofa/Helper/System/Binding_FileRepository.cpp b/bindings/Sofa/src/SofaPython3/Sofa/Helper/System/Binding_FileRepository.cpp
index 6cd5e08cb..ff71fca17 100644
--- a/bindings/Sofa/src/SofaPython3/Sofa/Helper/System/Binding_FileRepository.cpp
+++ b/bindings/Sofa/src/SofaPython3/Sofa/Helper/System/Binding_FileRepository.cpp
@@ -82,7 +82,7 @@ void moduleAddFileRepository(py::module &m) {
     file_repository.def_static(
         "relativeToPath",
         &sofa::helper::system::FileRepository::relativeToPath,
-        py::arg("path").none(false), py::arg("refPath").none(false), py::arg("doLowerCaseOnWin32") = true,
+        py::arg("path").none(false), py::arg("refPath").none(false),
         doc::FileRepository::relativeToPath
     );
 
diff --git a/bindings/Sofa/src/SofaPython3/Sofa/Helper/System/Binding_FileRepository_doc.h b/bindings/Sofa/src/SofaPython3/Sofa/Helper/System/Binding_FileRepository_doc.h
index 6c083ac5c..8707b65dd 100644
--- a/bindings/Sofa/src/SofaPython3/Sofa/Helper/System/Binding_FileRepository_doc.h
+++ b/bindings/Sofa/src/SofaPython3/Sofa/Helper/System/Binding_FileRepository_doc.h
@@ -82,9 +82,6 @@ static auto relativeToPath =
 R"(
 Returns a string such as refPath + string = path if path contains refPath.
 Otherwise returns path.
-On WIN32 the implementation was also returning the path in lower case. This behavior is now
-deprecated and should be remove the 2018-05-01. Until this date new implementation can be
-used by setting doLowerCaseOnWin32=false;
 )";
 
 static auto getPathsJoined =
diff --git a/docs/sphinx-stubs/Sofa/Helper/System/__init__.pyi b/docs/sphinx-stubs/Sofa/Helper/System/__init__.pyi
index ecc587d05..61f2d8a81 100644
--- a/docs/sphinx-stubs/Sofa/Helper/System/__init__.pyi
+++ b/docs/sphinx-stubs/Sofa/Helper/System/__init__.pyi
@@ -96,13 +96,10 @@ class FileRepository():
         Print the list of path to std::cout.
         """
     @staticmethod
-    def relativeToPath(path: str, refPath: str, doLowerCaseOnWin32: bool = True) -> str: 
+    def relativeToPath(path: str, refPath: str) -> str: 
         """
         Returns a string such as refPath + string = path if path contains refPath.
         Otherwise returns path.
-        On WIN32 the implementation was also returning the path in lower case. This behavior is now
-        deprecated and should be remove the 2018-05-01. Until this date new implementation can be
-        used by setting doLowerCaseOnWin32=false;
         """
     def removePath(self, path: str) -> None: 
         """