diff --git a/Build/Scripting/ZDoom_ACS.cfg b/Build/Scripting/ZDoom_ACS.cfg
index 6624b667..fb1e6675 100644
--- a/Build/Scripting/ZDoom_ACS.cfg
+++ b/Build/Scripting/ZDoom_ACS.cfg
@@ -119,7 +119,7 @@ keywords
 	Enter = "Script expression Enter";
 	Exit_Normal = "Exit_Normal(pos)";
 	Exit_Secret = "Exit_Secret(pos)";
-	FadeRange = "FadeRange(red1, green1, blue1, red2, green2, blue2, amount, seconds)";
+	FadeRange = "FadeRange(red1, green1, blue1, amount1, red2, green2, blue2, amount2, seconds)";
 	FadeTo = "FadeTo(red, green, blue, amount, seconds)";
 	FixedDiv = "FixedDiv(fa, fb)";
 	FixedMul = "FixedMul(fa, fb)";