diff --git a/plugins/include/amxconst.inc b/plugins/include/amxconst.inc
index 2944fcdc..8b4be8f5 100755
--- a/plugins/include/amxconst.inc
+++ b/plugins/include/amxconst.inc
@@ -351,6 +351,7 @@ enum
 	kRenderFxExplode,           /* Scale up really big! */
 	kRenderFxGlowShell,         /* Glowing Shell */
 	kRenderFxClampMinScale,     /* Keep this sprite from getting very small (SPRITES only!) */
+	kRenderFxLightMultiplier,   /* CTM !!!CZERO added to tell the studiorender that the value in iuser2 is a lightmultiplier */
 };
 
 /**