diff --git a/tools/tunslip6.c b/tools/tunslip6.c
index 4f3ff7e3e..3dda01c66 100644
--- a/tools/tunslip6.c
+++ b/tools/tunslip6.c
@@ -852,14 +852,6 @@ exit(1);
     break;
   }
 
-  if(*tundev == '\0') {
-    /* Use default. */
-    if(tap) {
-      strcpy(tundev, "tap0");
-    } else {
-      strcpy(tundev, "tun0");
-    }
-  }
   if(host != NULL) {
     struct addrinfo hints, *servinfo, *p;
     int rv;