diff --git a/src/Mod/Part/App/PreCompiled.h b/src/Mod/Part/App/PreCompiled.h
index 395f6d14a3..16377c8016 100644
--- a/src/Mod/Part/App/PreCompiled.h
+++ b/src/Mod/Part/App/PreCompiled.h
@@ -93,6 +93,8 @@
 #include <boost/uuid/uuid_io.hpp>
 
 #include "OpenCascadeAll.h"
+#include <math_Gauss.hxx>
+#include <math_Matrix.hxx>
 
 #elif defined(FC_OS_WIN32)
 #define WIN32_LEAN_AND_MEAN