diff --git a/src/Mod/Assembly/App/PreCompiled.h b/src/Mod/Assembly/App/PreCompiled.h
index 76e67ce7f..d814802f5 100644
--- a/src/Mod/Assembly/App/PreCompiled.h
+++ b/src/Mod/Assembly/App/PreCompiled.h
@@ -116,7 +116,6 @@
 #include <Standard_Static.hxx>
 #include <Standard_Storable.hxx>
 #include <Standard_Stream.hxx>
-#include <Standard_String.hxx>
 //#include <Standard_theForMapOfTypes.hxx>
 #include <Standard_TooManyUsers.hxx>
 #include <Standard_Transient.hxx>
diff --git a/src/Mod/Drawing/App/PreCompiled.h b/src/Mod/Drawing/App/PreCompiled.h
index bb3d325c9..ec335eb4f 100644
--- a/src/Mod/Drawing/App/PreCompiled.h
+++ b/src/Mod/Drawing/App/PreCompiled.h
@@ -106,7 +106,6 @@
 #include <Standard_SStream.hxx>
 #include <Standard_Storable.hxx>
 #include <Standard_Stream.hxx>
-#include <Standard_String.hxx>
 #include <Standard_TooManyUsers.hxx>
 #include <Standard_Transient.hxx>
 #include <Standard_Transient_proto.hxx>