diff --git a/src/Mod/Fem/Gui/TaskPostBoxes.cpp b/src/Mod/Fem/Gui/TaskPostBoxes.cpp
index f74cc9256a..14b383d983 100644
--- a/src/Mod/Fem/Gui/TaskPostBoxes.cpp
+++ b/src/Mod/Fem/Gui/TaskPostBoxes.cpp
@@ -59,6 +59,7 @@
 
 #include "TaskPostBoxes.h"
 #include "FemSettings.h"
+#include "ViewProviderFemPostFilter.h"
 #include "ViewProviderFemPostFunction.h"
 #include "ViewProviderFemPostObject.h"