diff --git a/source/core/initfs.cpp b/source/core/initfs.cpp
index 33b04446f..f18fd50d3 100644
--- a/source/core/initfs.cpp
+++ b/source/core/initfs.cpp
@@ -376,6 +376,9 @@ void InitFileSystem(TArray<GrpEntry>& groups)
 	LumpFilterInfo lfi;
 
 	lfi.dotFilter = LumpFilter;
+
+	if (g_gameType & (GAMEFLAG_DUKE | GAMEFLAG_NAM | GAMEFLAG_NAPALM | GAMEFLAG_WW2GI | GAMEFLAG_RRALL)) lfi.gameTypeFilter.Push("DukeEngine");
+
 	lfi.postprocessFunc = [&]()
 	{
 		DeleteStuff(fileSystem, todelete, groups.Size());