diff --git a/src/Mod/TechDraw/Gui/CommandAlign.cpp b/src/Mod/TechDraw/Gui/CommandAlign.cpp
index 5fc81500da..0a4fd98a47 100644
--- a/src/Mod/TechDraw/Gui/CommandAlign.cpp
+++ b/src/Mod/TechDraw/Gui/CommandAlign.cpp
@@ -18,7 +18,10 @@
  *                                                                         *
  ***************************************************************************/
 
+#include "PreCompiled.h"
+#ifndef _PreComp_
 #include <QMessageBox>
+#endif
 
 #include <App/DocumentObject.h>
 #include <Base/Console.h>