diff --git a/nsupdate.sh b/nsupdate.sh
index 5a21393..32ff655 100755
--- a/nsupdate.sh
+++ b/nsupdate.sh
@@ -33,7 +33,8 @@ command -v drill >/dev/null 2>&1 || command -v nslookup >/dev/null 2>&1 || { ech
 ##################
 # check config   #
 ##################
-if [ ! -f nsupdate.d/*.config ]; then
+configfiles=$(shopt -s nullglob dotglob; echo nsupdate.d/*.config)
+if (( ! ${#configfiles} ));then
     echo "There does not seem to be any config file available." ; exit 1;
 fi
 ##################