diff --git a/config/backup/backup.pl b/config/backup/backup.pl
index 7b2f95304..3b10b8707 100644
--- a/config/backup/backup.pl
+++ b/config/backup/backup.pl
@@ -21,7 +21,7 @@
 
 shopt -s nullglob
 
-NOW="$(date "+%Y-%m-%d_%H-%M")"
+NOW="$(date "+%Y-%m-%d-%H%M")"
 
 list_addons() {
 	local file