diff --git a/src/plugins/splash/script/script-lib-math.script b/src/plugins/splash/script/script-lib-math.script
index d71b338b..e5c65424 100644
--- a/src/plugins/splash/script/script-lib-math.script
+++ b/src/plugins/splash/script/script-lib-math.script
@@ -8,8 +8,8 @@ fun MathMin (value_a, value_b){
     return value_b;
     }
 
-fun MathMax (value, max){
-    if (value_a > value_a) return value_a;
+fun MathMax (value_a, value_b){
+    if (value_a > value_b) return value_a;
     return value_b;
     }