diff --git a/Geo/GModelIO_Mesh.cpp b/Geo/GModelIO_Mesh.cpp
index f59f9c89a223171d00c74093f7be16a1f3381d31..55b78834c367157fbb325310c929f3784a294817 100644
--- a/Geo/GModelIO_Mesh.cpp
+++ b/Geo/GModelIO_Mesh.cpp
@@ -1116,7 +1116,7 @@ int GModel::readSTL(const std::string &name, double tolerance)
         double z = points[i][j + k].z();
         v[k] = pos.find(x, y, z, eps);
       }
-      MFace mf (v[0],v[1],v[2]);
+      MFace mf (v[0], v[1], v[2]);
       if (unique.find(mf) == unique.end()){
 	faces[i]->triangles.push_back(new MTriangle(v[0], v[1], v[2]));
 	unique.insert(mf);