diff --git a/src/Mod/Mesh/App/Mesh.cpp b/src/Mod/Mesh/App/Mesh.cpp
index bd058aa9ca..5015925d23 100644
--- a/src/Mod/Mesh/App/Mesh.cpp
+++ b/src/Mod/Mesh/App/Mesh.cpp
@@ -56,7 +56,7 @@
 
 using namespace Mesh;
 
-float MeshObject::Epsilon = 1.0e-5f;
+const float MeshObject::Epsilon = 1.0e-5F;
 
 TYPESYSTEM_SOURCE(Mesh::MeshObject, Data::ComplexGeoData)
 TYPESYSTEM_SOURCE(Mesh::MeshSegment, Data::Segment)
diff --git a/src/Mod/Mesh/App/Mesh.h b/src/Mod/Mesh/App/Mesh.h
index c54b74f5fe..88e8d6972a 100644
--- a/src/Mod/Mesh/App/Mesh.h
+++ b/src/Mod/Mesh/App/Mesh.h
@@ -428,7 +428,7 @@ private:
     Base::Matrix4D _Mtrx;
     MeshCore::MeshKernel _kernel;
     std::vector<Segment> _segments;
-    static float Epsilon;
+    static const float Epsilon;
 };
 
 } // namespace Mesh