diff --git a/roles/dns/files/update-dns b/roles/dns/files/update-dns
index 7f617c137f..1719057af9 100755
--- a/roles/dns/files/update-dns
+++ b/roles/dns/files/update-dns
@@ -10,7 +10,7 @@ fi
 cd $destdir
 git fetch origin
 
-if [ "`git diff origin/master master`" != "" ];
+if [ "`git diff origin/master`" != "" ];
 then
   git pull -X theirs
   # change context so the chroot can cope