diff --git a/shell/shell.sh b/shell/shell.sh
index d8df42b..b50964e 100644
--- a/shell/shell.sh
+++ b/shell/shell.sh
@@ -34,7 +34,7 @@ shell_configure() {
 	case "${SH}" in
 	"bash")
 		# completion
-		file="/usr/share/bash-completion/bash_completion"
+		local file="/usr/share/bash-completion/bash_completion"
 		if [ -f "${file}" ]; then
 			. "${file}"
 		fi
@@ -43,8 +43,7 @@ shell_configure() {
 		HISTSIZE=-1
 		HISTTIMEFORMAT="%Y%m%d %H%M%S "
 		;;
-	*)
-		;;
+	*) ;;
 	esac
 }
 shell_configure