diff --git a/usr/lib/hacking-bash.sh b/usr/lib/hacking-bash.sh
index f705421..481930c 100644
--- a/usr/lib/hacking-bash.sh
+++ b/usr/lib/hacking-bash.sh
@@ -234,7 +234,7 @@ function is_positive_integer
 {
 	(( $# < 1 )) && return 1
 	
-	[[ $1 =~ ^([1-9][0-9]*|0)$ ]] && return 0
+	[[ $1 =~ ^([0-9]+)$ ]] && return 0
 	
 	return 1
 }