diff --git a/src/Mod/Sketcher/App/SketchObjectPy.xml b/src/Mod/Sketcher/App/SketchObjectPy.xml
index 4e892ba82e..3972336965 100644
--- a/src/Mod/Sketcher/App/SketchObjectPy.xml
+++ b/src/Mod/Sketcher/App/SketchObjectPy.xml
@@ -177,6 +177,11 @@
             <UserDocu>Increases the given BSpline Degree by a number of degrees</UserDocu>
         </Documentation>
     </Methode>
+    <Methode Name="modifyBSplineKnotMultiplicity">
+        <Documentation>
+            <UserDocu>Increases or reduces the given BSpline knot multiplicity</UserDocu>
+        </Documentation>
+    </Methode>
     <Methode Name="calculateAngleViaPoint">
       <Documentation>
         <UserDocu>
diff --git a/src/Mod/Sketcher/App/SketchObjectPyImp.cpp b/src/Mod/Sketcher/App/SketchObjectPyImp.cpp
index 6edb28fb5b..b6aa9a5529 100644
--- a/src/Mod/Sketcher/App/SketchObjectPyImp.cpp
+++ b/src/Mod/Sketcher/App/SketchObjectPyImp.cpp
@@ -1084,6 +1084,25 @@ PyObject* SketchObjectPy::increaseBSplineDegree(PyObject *args)
     Py_Return;
 }
 
+PyObject* SketchObjectPy::modifyBSplineKnotMultiplicity(PyObject *args)
+{
+    int GeoId;
+    int knotIndex;
+    int multiplicity = 1;
+
+    if (!PyArg_ParseTuple(args, "ii|i", &GeoId, &knotIndex, &multiplicity))
+        return 0;
+
+    if (this->getSketchObjectPtr()->modifyBSplineKnotMultiplicity(GeoId, knotIndex, multiplicity)==false) {
+        std::stringstream str;
+        str << "Multiplicity modification failed for: " << GeoId;
+        PyErr_SetString(PyExc_ValueError, str.str().c_str());
+        return 0;
+    }
+    
+    Py_Return;
+}
+
 Py::Long SketchObjectPy::getConstraintCount(void) const
 {
     return Py::Long(this->getSketchObjectPtr()->Constraints.getSize());