diff --git a/src/r_data/a_dynlightdata.cpp b/src/r_data/a_dynlightdata.cpp
index f3bcf56c0e..c20c8d2e9c 100644
--- a/src/r_data/a_dynlightdata.cpp
+++ b/src/r_data/a_dynlightdata.cpp
@@ -69,7 +69,7 @@ FSerializer &Serialize(FSerializer &arc, const char *key, FLightDefaults &value,
 	if (arc.BeginObject(key))
 	{
 		arc("name", value.m_Name)
-			.Array("args", value.m_Args, 5,  nullptr)
+			.Array("args", value.m_Args, 5)
 			("param", value.m_Param)
 			("pos", value.m_Pos)
 			("type", value.m_type)