diff --git a/src/Mod/Part/App/Geometry.cpp b/src/Mod/Part/App/Geometry.cpp
index 4f462f8676..16159134bb 100644
--- a/src/Mod/Part/App/Geometry.cpp
+++ b/src/Mod/Part/App/Geometry.cpp
@@ -4622,7 +4622,7 @@ GeomSurface::~GeomSurface()
 // Copied from OCC BRepBndLib_1.cxx
 //=======================================================================
 // Function : IsPlanar
-// purpose : Returns TRUE if theSurfaceurface is plane-like.
+// purpose : Returns TRUE if theSurface is plane-like.
 //=======================================================================
 static Standard_Boolean IsPlanar(const Adaptor3d_Surface& theSurface)
 {