diff --git a/configure b/configure
index 0f304206..9ec19a5b 100755
--- a/configure
+++ b/configure
@@ -517,10 +517,12 @@ else
 				shift 2 ;;
 			-h | --help)
 				usage 0 ;;
+			--*)
+				shift ;;
 			"")
 				break ;;
 			*)
-				shift 1 ;;
+				usage 1 ;;
 		esac
 	done
 fi