diff --git a/tools/miaou-exec b/tools/miaou-exec
index cb66507..9c1480b 100755
--- a/tools/miaou-exec
+++ b/tools/miaou-exec
@@ -29,15 +29,12 @@ function parse_options {
 				COMMAND_LINE+=("$@")
 				break
 				;;
+			-*)
+				# options if any
+				echo >&2 "Unknown option: $1" && usage && exit 2
+				;;
 			*)
-				if [[ $1 =~ ^- ]]; then
-					# options if any
-					echo >&2 "Unknown option: $1" && usage && exit 2
-				elif [[ -z $CONTAINER ]]; then
-					CONTAINER=$1
-				else
-					COMMAND_LINE+=("$1")
-				fi
+				[[ -z $CONTAINER ]] && CONTAINER=$1 || COMMAND_LINE+=("$1")
 				;;
 		esac
 		shift 1