diff --git a/src/Mod/Fem/Gui/ViewProviderFemMeshShapeNetgen.cpp b/src/Mod/Fem/Gui/ViewProviderFemMeshShapeNetgen.cpp
index 760bb20ed8..f73bc623b9 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemMeshShapeNetgen.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemMeshShapeNetgen.cpp
@@ -28,6 +28,7 @@
 # include <QAction>
 # include <QCoreApplication>
 # include <QMenu>
+# include <QMessageBox>
 #endif
 
 #include "ViewProviderFemMeshShapeNetgen.h"