diff --git a/src/mmg3d/colver_3d.c b/src/mmg3d/colver_3d.c
index 5400b4a72..3c2b34dfa 100644
--- a/src/mmg3d/colver_3d.c
+++ b/src/mmg3d/colver_3d.c
@@ -393,8 +393,8 @@ int MMG3D_get_shellEdgeTag_oneDir(MMG5_pMesh  mesh,MMG5_int start, MMG5_int na,
     if ( pt->xt ) {
       pxt = &mesh->xtetra[pt->xt];
       *ref  = pxt->edg[i];
-      if ( pxt->tag[i] & MG_BDY ) {
-        *tag |= pxt->tag[i];
+      if ((pxt->ftag[MMG5_ifar[i][0]] & MG_BDY) || (pxt->ftag[MMG5_ifar[i][1]] & MG_BDY)) {
+        *tag |= (pxt->tag[i] | MG_BDY);
         *filled = 1;
         return adj;
       }
@@ -444,8 +444,8 @@ int MMG3D_get_shellEdgeTag(MMG5_pMesh  mesh,MMG5_int start, int8_t ia,int16_t *t
 
   if ( pt->xt ) {
     pxt = &mesh->xtetra[pt->xt];
-    if ( pxt->tag[ia] & MG_BDY ) {
-      *tag |= pxt->tag[ia];
+    if ((pxt->ftag[MMG5_ifar[ia][0]] & MG_BDY) || (pxt->ftag[MMG5_ifar[ia][1]] & MG_BDY)) {
+      *tag |= (pxt->tag[ia] | MG_BDY);
       *ref = pxt->edg[ia];
       return 1;
     }