diff --git a/src/Mod/Path/App/VoronoiCellPyImp.cpp b/src/Mod/Path/App/VoronoiCellPyImp.cpp
index bf4e998aff..8e780f2d57 100644
--- a/src/Mod/Path/App/VoronoiCellPyImp.cpp
+++ b/src/Mod/Path/App/VoronoiCellPyImp.cpp
@@ -128,7 +128,7 @@ Py::Long VoronoiCellPy::getColor(void) const {
 }
 
 void VoronoiCellPy::setColor(Py::Long color) {
-  getCellFromPy(this)->color(int(color) & Voronoi::ColorMask);
+  getCellFromPy(this)->color(long(color) & Voronoi::ColorMask);
 }
 
 Py::Long VoronoiCellPy::getSourceIndex(void) const
diff --git a/src/Mod/Path/App/VoronoiEdgePyImp.cpp b/src/Mod/Path/App/VoronoiEdgePyImp.cpp
index 91a3d50268..6043754b60 100644
--- a/src/Mod/Path/App/VoronoiEdgePyImp.cpp
+++ b/src/Mod/Path/App/VoronoiEdgePyImp.cpp
@@ -147,7 +147,7 @@ Py::Long VoronoiEdgePy::getColor(void) const {
 }
 
 void VoronoiEdgePy::setColor(Py::Long color) {
-  getEdgeFromPy(this)->color(int(color) & Voronoi::ColorMask);
+  getEdgeFromPy(this)->color(long(color) & Voronoi::ColorMask);
 }
 
 Py::List VoronoiEdgePy::getVertices(void) const
diff --git a/src/Mod/Path/App/VoronoiVertexPyImp.cpp b/src/Mod/Path/App/VoronoiVertexPyImp.cpp
index c03fa30b55..837c2efea4 100644
--- a/src/Mod/Path/App/VoronoiVertexPyImp.cpp
+++ b/src/Mod/Path/App/VoronoiVertexPyImp.cpp
@@ -130,7 +130,7 @@ Py::Long VoronoiVertexPy::getColor(void) const {
 }
 
 void VoronoiVertexPy::setColor(Py::Long color) {
-  getVertexFromPy(this)->color(int(color) & Voronoi::ColorMask);
+  getVertexFromPy(this)->color(long(color) & Voronoi::ColorMask);
 }
 
 Py::Float VoronoiVertexPy::getX(void) const