diff --git a/register.sh b/register.sh
index b15064f..06f4c7e 100755
--- a/register.sh
+++ b/register.sh
@@ -17,7 +17,7 @@ while :;do
 	[ -f $install_dir/lock ] && continue
 
 	file=$(get_stack)
-	[ -z $file ] && continue
+	[ -z $file ] && sleep ${interval:-1}m && continue
 
 	ping -c 1 fsf.org > /dev/null 2>&1 || continue
 	test_url="$(curl -s -X POST -o /dev/null -w "%{http_code}" $url)"