diff --git a/src/p_polyobj.c b/src/p_polyobj.c
index a65885f16..ae73fd31f 100644
--- a/src/p_polyobj.c
+++ b/src/p_polyobj.c
@@ -217,7 +217,8 @@ static void Polyobj_GetInfo(polyobj_t *po, line_t *line)
 	if (po->parent == po->id) // do not allow a self-reference
 		po->parent = -1;
 
-	po->translucency = max(min(line->args[2], NUMTRANSMAPS), 0);
+	if (udmf)
+		po->translucency = max(min(line->args[2], NUMTRANSMAPS), 0);
 
 	if (udmf)
 	{