diff --git a/ospf_brr b/ospf_brr
index 8de012f..c4f80e2 100755
--- a/ospf_brr
+++ b/ospf_brr
@@ -45,7 +45,7 @@ router ospf
  network $ip_tun area 0
 exit
 !
-interface gre1
+interface $tun
  ip ospf network point-to-point
  ip ospf authentication message-digest
  ip ospf message-digest-key 1 md5 1
diff --git a/ospf_hqr b/ospf_hqr
index cc97b74..d53f2f8 100755
--- a/ospf_hqr
+++ b/ospf_hqr
@@ -45,7 +45,7 @@ router ospf
  network $ip_tun area 0
 exit
 !
-interface gre1
+interface $tun
  ip ospf network point-to-point
  ip ospf authentication message-digest
  ip ospf message-digest-key 1 md5 1