diff --git a/src/p_ceilng.c b/src/p_ceilng.c
index cef08b5ee..d781fd047 100644
--- a/src/p_ceilng.c
+++ b/src/p_ceilng.c
@@ -244,7 +244,7 @@ INT32 EV_DoCeiling(mtag_t tag, line_t *line, ceiling_e type)
 	// This function is deprecated.
 	// Use any of the following functions directly, instead.
 	
-	if (!udmf)
+	if (mapnamespace == MNS_SRB2KART)
 	{
 		return EV_DoCeilingOLD(tag,line,type);
 	}
diff --git a/src/p_floor.c b/src/p_floor.c
index f3bf5100b..db6cf162e 100644
--- a/src/p_floor.c
+++ b/src/p_floor.c
@@ -1596,7 +1596,7 @@ void EV_DoFloor(mtag_t tag, line_t *line, floor_e floortype)
 	// This function is deprecated.
 	// Use any of the following functions directly, instead.
 	
-	if (!udmf)
+	if (mapnamespace == MNS_SRB2KART)
 	{
 		EV_DoFloorOLD(tag, line, floortype);
 		return;