diff --git a/src/maploader/udmf.cpp b/src/maploader/udmf.cpp
index 1820270d3..7ff310d28 100644
--- a/src/maploader/udmf.cpp
+++ b/src/maploader/udmf.cpp
@@ -792,7 +792,7 @@ class UDMFParser : public UDMFParserBase
 				th->friendlyseeblocks = CheckInt(key);
 				break;
 
-			case NAME_SoftShadowRadius:
+			case NAME_light_softshadowradius:
 				th->SoftShadowRadius = (float)CheckFloat(key);
 				break;
 
diff --git a/src/namedef_custom.h b/src/namedef_custom.h
index 7f7684d3d..6f2338009 100644
--- a/src/namedef_custom.h
+++ b/src/namedef_custom.h
@@ -868,7 +868,7 @@ xx(lm_dynamic)
 xx(lm_suncolor)
 
 // Light keywords
-xx(SoftShadowRadius)
+xx(light_softshadowradius)
 
 xx(skew_bottom_type)
 xx(skew_middle_type)