diff --git a/src/Mod/Sketcher/Gui/ViewProviderSketch.cpp b/src/Mod/Sketcher/Gui/ViewProviderSketch.cpp
index a74f447edc..da378d8c1d 100644
--- a/src/Mod/Sketcher/Gui/ViewProviderSketch.cpp
+++ b/src/Mod/Sketcher/Gui/ViewProviderSketch.cpp
@@ -1409,7 +1409,7 @@ void ViewProviderSketch::moveConstraint(int constNum, const Base::Vector2d &toPo
 #ifdef _DEBUG
     assert(int(geomlist.size()) == extGeoCount + intGeoCount);
     assert((Constr->First >= -extGeoCount && Constr->First < intGeoCount)
-           || Constr->First != Constraint::GeoUndef);
+           || Constr->First != GeoEnum::GeoUndef);
 #endif
 
     if (Constr->Type == Distance || Constr->Type == DistanceX || Constr->Type == DistanceY ||