diff --git a/xCAT-server/share/xcat/netboot/ubuntu/genimage b/xCAT-server/share/xcat/netboot/ubuntu/genimage
index c0d6d1f7e..4feeb6bf1 100755
--- a/xCAT-server/share/xcat/netboot/ubuntu/genimage
+++ b/xCAT-server/share/xcat/netboot/ubuntu/genimage
@@ -747,6 +747,7 @@ sub mkinitrd {
         push @ndrivers, "sunrpc.ko";
         push @ndrivers, "lockd.ko";
         push @ndrivers, "nfs_acl.ko";
+        push @ndrivers, "auth_rpcgss.ko";
         push @ndrivers, "nfs.ko";
     
         # Additional modules needed on s390x