diff --git a/package.json b/package.json
index 5d27047..26060de 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mmkr",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "description": "MMaker's After Effects Expression Library",
   "main": "dist/mmkr.jsx",
   "scripts": {
diff --git a/src/index.ts b/src/index.ts
index 8e56e5e..abc73a1 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -51,9 +51,9 @@ function get_functions(time: number = thisLayer.time)
 	}
 
 	const YTPMV = {
-		flip: function(mult = 100, input_property = thisProperty)
+		flip: function(input_property = thisProperty, mult = 100)
 		{
-			const n = get_key_index(input_property);
+			const n = get_key_index(undefined, input_property);
 			return (n % 2 != 0 || n == 0) ? 1*mult : -mult;
 		},