diff --git a/src/maploader/maploader.cpp b/src/maploader/maploader.cpp
index e64ee25aa..e021ba843 100644
--- a/src/maploader/maploader.cpp
+++ b/src/maploader/maploader.cpp
@@ -3245,6 +3245,8 @@ void MapLoader::LoadLevel(MapData *map, const char *lumpname, int position)
 	{
 		if (sec.floorplane.isSlope()) sec.reflect[sector_t::floor] = 0;
 		if (sec.ceilingplane.isSlope()) sec.reflect[sector_t::ceiling] = 0;
+
+		sec.CheckExColorFlag();
 	}
 	for (auto &node : Level->nodes)
 	{
diff --git a/src/maploader/udmf.cpp b/src/maploader/udmf.cpp
index c1aae1715..33d10cdeb 100644
--- a/src/maploader/udmf.cpp
+++ b/src/maploader/udmf.cpp
@@ -2312,11 +2312,6 @@ public:
 
 		// Create the real linedefs and decompress the sidedefs
 		ProcessLineDefs();
-		// enable the excolor flag on all sidedefs which need it for a gradient transfer from the sector.
-		for (auto& sec : Level->sectors)
-		{
-			sec.CheckExColorFlag();	
-		}
 	}
 };