diff --git a/gui/action.cpp b/gui/action.cpp
index b77e7e7..c471533 100644
--- a/gui/action.cpp
+++ b/gui/action.cpp
@@ -824,6 +824,11 @@
 		return 0;
 	}
 
+	if (function == "setbrightness")
+	{
+		return TWFunc::Set_Brightness(arg);
+	}
+
 	if (isThreaded)
 	{
 		if (function == "fileexists")