diff --git a/src/Mod/Mesh/Gui/DlgEvaluateMeshImp.h b/src/Mod/Mesh/Gui/DlgEvaluateMeshImp.h
index ede8719b53..a553747946 100644
--- a/src/Mod/Mesh/Gui/DlgEvaluateMeshImp.h
+++ b/src/Mod/Mesh/Gui/DlgEvaluateMeshImp.h
@@ -26,6 +26,7 @@
 
 #include <map>
 #include <QPointer>
+#include <QDialog>
 
 #include <App/Application.h>
 #include <App/Document.h>