diff --git a/src/Mod/Sketcher/App/planegcs/GCS.cpp b/src/Mod/Sketcher/App/planegcs/GCS.cpp
index 810673717a..3ee7f0dfa0 100644
--- a/src/Mod/Sketcher/App/planegcs/GCS.cpp
+++ b/src/Mod/Sketcher/App/planegcs/GCS.cpp
@@ -1368,6 +1368,7 @@ int System::addConstraintInternalAlignmentKnotPoint(BSpline &b, Point &p, unsign
     Constraint *constr = new ConstraintWeightedLinearCombination(numpoles, pvec, weights);
     constr->setTag(tagId);
     constr->setDriving(driving);
+    constr->setInternalAlignment(Constraint::Alignment::InternalAlignment);
     addConstraint(constr);
 
     pvec.clear();
@@ -1380,6 +1381,7 @@ int System::addConstraintInternalAlignmentKnotPoint(BSpline &b, Point &p, unsign
     constr = new ConstraintWeightedLinearCombination(numpoles, pvec, weights);
     constr->setTag(tagId);
     constr->setDriving(driving);
+    constr->setInternalAlignment(Constraint::Alignment::InternalAlignment);
     return addConstraint(constr);
 }