diff --git a/src/Mod/Part/App/Geometry.cpp b/src/Mod/Part/App/Geometry.cpp
index 3536a2093b..2ebf25ad84 100644
--- a/src/Mod/Part/App/Geometry.cpp
+++ b/src/Mod/Part/App/Geometry.cpp
@@ -646,6 +646,11 @@ int GeomBSplineCurve::countPoles() const
     return myCurve->NbPoles();
 }
 
+int GeomBSplineCurve::countKnots() const
+{
+    return myCurve->NbKnots();
+}
+
 void GeomBSplineCurve::setPole(int index, const Base::Vector3d& pole, double weight)
 {
     try {
diff --git a/src/Mod/Part/App/Geometry.h b/src/Mod/Part/App/Geometry.h
index 2b20ed7adf..bb579d4e70 100644
--- a/src/Mod/Part/App/Geometry.h
+++ b/src/Mod/Part/App/Geometry.h
@@ -214,6 +214,7 @@ public:
                                    std::vector<gp_Vec>&) const;
 
     int countPoles() const;
+    int countKnots() const;
     void setPole(int index, const Base::Vector3d&, double weight=-1);
     void setPoles(const std::vector<Base::Vector3d>& poles, const std::vector<double>& weights);
     void setPoles(const std::vector<Base::Vector3d>& poles);