diff --git a/README.md b/README.md
index d944b31..ad64b5b 100644
--- a/README.md
+++ b/README.md
@@ -63,7 +63,7 @@ thing // Lightmap point light (Light color and distance properties use the same
 thing // Lightmap spotlight (Light color, distance and angle properties use the same args as dynamic lights)
 {
 	type = 9881;
-	sourceradius = <float> (default: 5, radius of the light source in map units; controls the softness)
+	SourceRadius = <float> (default: 5, radius of the light source in map units; controls the shadow softness. Note that dynamic raytraced lights can also use this feature)
 }
 
 linedef