diff --git a/src/Mod/Part/App/Geometry.cpp b/src/Mod/Part/App/Geometry.cpp
index 545a7f387a..376f90e890 100644
--- a/src/Mod/Part/App/Geometry.cpp
+++ b/src/Mod/Part/App/Geometry.cpp
@@ -479,7 +479,7 @@ bool GeomCurve::intersect(  GeomCurve * c,
 
 bool GeomCurve::intersect(const Handle(Geom_Curve) curve1, const Handle(Geom_Curve) curve2,
                 std::vector<std::pair<Base::Vector3d, Base::Vector3d>>& points,
-                double tol) const
+                double tol)
 {
     // https://forum.freecadweb.org/viewtopic.php?f=10&t=31700
     if (curve1->IsKind(STANDARD_TYPE(Geom_BoundedCurve)) &&
diff --git a/src/Mod/Part/App/Geometry.h b/src/Mod/Part/App/Geometry.h
index ac0254aed6..b414a7b4b7 100644
--- a/src/Mod/Part/App/Geometry.h
+++ b/src/Mod/Part/App/Geometry.h
@@ -179,9 +179,9 @@ public:
     void reverse(void);
     
 protected:
-    bool intersect(const Handle(Geom_Curve) c, const Handle(Geom_Curve) c2, 
-                   std::vector<std::pair<Base::Vector3d, Base::Vector3d>>& points, 
-                   double tol = Precision::Confusion()) const;    
+    static bool intersect(const Handle(Geom_Curve) c, const Handle(Geom_Curve) c2,
+                          std::vector<std::pair<Base::Vector3d, Base::Vector3d>>& points,
+                          double tol = Precision::Confusion());
 };
 
 class PartExport GeomBoundedCurve : public GeomCurve