diff --git a/convert-psp b/convert-psp
index 5fbaa16..dfc5522 100644
--- a/convert-psp
+++ b/convert-psp
@@ -9,9 +9,7 @@ help(){
 	exit 1
 }
 
-[ -z "$1" ] && help
-[ "$1" == "-h" ] && help
-[ "$1" == "--help" ] && help
+[[ -z "$1" || "$1" == "-h" || "$1" == "--help" ]] && help
 
 saveifs=$IFS
 IFS=$'\n'