diff --git a/src/Mod/Part/App/Geometry.cpp b/src/Mod/Part/App/Geometry.cpp
index 6096e4a2eb..757b3048a1 100644
--- a/src/Mod/Part/App/Geometry.cpp
+++ b/src/Mod/Part/App/Geometry.cpp
@@ -1530,6 +1530,18 @@ void GeomBSplineCurve::increaseMultiplicity(int index, int multiplicity)
         curve->IncreaseMultiplicity(index, multiplicity);
         return;
     }
+    catch (Standard_Failure& e) {
+        THROWM(Base::CADKernelError,e.GetMessageString())
+            }
+}
+
+void GeomBSplineCurve::insertKnot(double param, int multiplicity)
+{
+    try {
+        Handle(Geom_BSplineCurve) curve = Handle(Geom_BSplineCurve)::DownCast(this->handle());
+        curve->InsertKnot(param, multiplicity);
+        return;
+    }
     catch (Standard_Failure& e) {
         THROWM(Base::CADKernelError,e.GetMessageString())
     }
diff --git a/src/Mod/Part/App/Geometry.h b/src/Mod/Part/App/Geometry.h
index 2a3c09a316..adc55da70a 100644
--- a/src/Mod/Part/App/Geometry.h
+++ b/src/Mod/Part/App/Geometry.h
@@ -308,6 +308,7 @@ public:
     bool approximate(double tol3d, int maxSegments, int maxDegree, int continuity);
 
     void increaseMultiplicity(int index, int multiplicity);
+    void insertKnot(double param, int multiplicity);
     bool removeKnot(int index, int multiplicity, double tolerance = Precision::PConfusion());
 
     void Trim(double u, double v);