diff --git a/common/dialog.sh b/common/dialog.sh
index 44f78c41..ec1c9aa2 100644
--- a/common/dialog.sh
+++ b/common/dialog.sh
@@ -36,11 +36,11 @@ ask_list()
 	# $3 - (optional) default value
 	local M_DEFAULT
 	eval M_DEFAULT="\$$1"
-	local M_ALL=$M_DEFAULT
+	local M_DEFAULT_VAR="$M_DEFAULT"
 	local M="" m
-	
+
 	[ -n "$3" ] && { find_str_in_list "$M_DEFAULT" "$2" || M_DEFAULT="$3" ;}
-	
+
 	n=1
 	for m in $2; do
 		echo $n : $m
@@ -52,6 +52,6 @@ ask_list()
 	[ -z "$M" ] && M="$M_DEFAULT"
 	echo selected : $M
 	eval $1="\"$M\""
-	
-	[ "$M" != "$M_DEFAULT" ]
+
+	[ "$M" != "$M_DEFAULT_VAR" ]
 }