diff --git a/src/App/Enumeration.cpp b/src/App/Enumeration.cpp
index b6e7e8245..6e3a35326 100644
--- a/src/App/Enumeration.cpp
+++ b/src/App/Enumeration.cpp
@@ -21,13 +21,15 @@
  ***************************************************************************/
 
 #include "PreCompiled.h"
+#ifndef _PreComp_
+# include <cassert>
+# include <cstring>
+# include <cstdlib>
+#endif
 
 #include <Base/Exception.h>
-
 #include "Enumeration.h"
 
-#include <cassert>
-
 using namespace App;
 
 Enumeration::Enumeration()