diff --git a/src/Gui/InputVector.cpp b/src/Gui/InputVector.cpp
index 0afec49a8..de8683dfc 100644
--- a/src/Gui/InputVector.cpp
+++ b/src/Gui/InputVector.cpp
@@ -22,6 +22,9 @@
 
 
 #include "PreCompiled.h"
+#ifndef _PreComp_
+# include <QComboBox>
+#endif
 
 #include "InputVector.h"
 #include "ui_InputVector.h"