diff --git a/files/usr/local/bin/olsrd-config b/files/usr/local/bin/olsrd-config
index e82be6ab..608d9cf9 100755
--- a/files/usr/local/bin/olsrd-config
+++ b/files/usr/local/bin/olsrd-config
@@ -144,6 +144,7 @@ if ( @tunnels )
   foreach(@tunnels) { push @file, qq("$_" ) }
   push @file, qq(\n{\n);
   push @file, qq(     Ip4Broadcast 255.255.255.255\n);
+  push @file, qq(     Mode \"ether\"\n);
   push @file, qq(}\n);
 }