diff --git a/source/blender/editors/mesh/editmesh_tools.cc b/source/blender/editors/mesh/editmesh_tools.cc
index 18eca394c45..7a4a1ce8fbd 100644
--- a/source/blender/editors/mesh/editmesh_tools.cc
+++ b/source/blender/editors/mesh/editmesh_tools.cc
@@ -2697,15 +2697,19 @@ static int edbm_do_smooth_vertex_exec(bContext *C, wmOperator *op)
       }
     }
 
+    /* NOTE: redundant calculation could be avoided if the EDBM API could skip calculation. */
+    bool calc_normals = false;
+
     /* apply mirror */
     if (((Mesh *)obedit->data)->symmetry & ME_SYMMETRY_X) {
       EDBM_verts_mirror_apply(em, BM_ELEM_SELECT, 0);
       EDBM_verts_mirror_cache_end(em);
+      calc_normals = true;
     }
 
     EDBMUpdate_Params params{};
     params.calc_looptris = true;
-    params.calc_normals = false;
+    params.calc_normals = calc_normals;
     params.is_destructive = false;
     EDBM_update(static_cast<Mesh *>(obedit->data), &params);
   }
@@ -2815,15 +2819,19 @@ static int edbm_do_smooth_laplacian_vertex_exec(bContext *C, wmOperator *op)
       continue;
     }
 
+    /* NOTE: redundant calculation could be avoided if the EDBM API could skip calculation. */
+    bool calc_normals = false;
+
     /* Apply mirror. */
     if (((Mesh *)obedit->data)->symmetry & ME_SYMMETRY_X) {
       EDBM_verts_mirror_apply(em, BM_ELEM_SELECT, 0);
       EDBM_verts_mirror_cache_end(em);
+      calc_normals = true;
     }
 
     EDBMUpdate_Params params{};
     params.calc_looptris = true;
-    params.calc_normals = false;
+    params.calc_normals = calc_normals;
     params.is_destructive = false;
     EDBM_update(static_cast<Mesh *>(obedit->data), &params);
   }