diff --git a/src/util/virnetdevopenvswitch.c b/src/util/virnetdevopenvswitch.c
index 601d79e629..b903ae4ee6 100644
--- a/src/util/virnetdevopenvswitch.c
+++ b/src/util/virnetdevopenvswitch.c
@@ -99,7 +99,7 @@ int virNetDevOpenvswitchAddPort(const char *brname, const char *ifname,
                 virBufferAddLit(buf, ",");
                 virBufferAsprintf(buf, "%d", virtVlan->tag[i]);
             }
-        } else {
+        } else if (virtVlan->nTags) {
             virBufferAsprintf(buf, "tag=%d", virtVlan->tag[0]);
         }
     }