diff --git a/source/blender/blenkernel/intern/mesh.c b/source/blender/blenkernel/intern/mesh.c
index 408a141608d..ef2249409f0 100644
--- a/source/blender/blenkernel/intern/mesh.c
+++ b/source/blender/blenkernel/intern/mesh.c
@@ -1248,8 +1248,6 @@ void mesh_set_smooth_flag(Object *meshOb, int enableSmooth)
 			mf->flag &= ~ME_SMOOTH;
 		}
 	}
-
-	mesh_calc_normals(me->mvert, me->totvert, me->mface, me->totface, NULL);
 }
 
 void mesh_calc_normals(MVert *mverts, int numVerts, MFace *mfaces, int numFaces, float (*faceNors_r)[3])