diff --git a/src/d_main.cpp b/src/d_main.cpp
index 34ae5b3696..875f892bf9 100644
--- a/src/d_main.cpp
+++ b/src/d_main.cpp
@@ -3161,9 +3161,10 @@ static int D_InitGame(const FIWADInfo* iwad_info, std::vector<std::string>& allw
 
 	lfi.gameTypeFilter.push_back(LumpFilterIWAD.GetChars());
 	// Workaround for old Doom filter names.
-	if (LumpFilterIWAD.Compare("doom.id.doom") == 0)
+	if (LumpFilterIWAD.IndexOf("doom.id.doom") >= 0)
 	{
-		lfi.gameTypeFilter.push_back("doom.doom");
+		FString NewFilterName = (FString)"doom.doom" + LumpFilterIWAD.Mid(12); // "doom.id.doom" is 12 characters
+		lfi.gameTypeFilter.push_back(NewFilterName.GetChars());
 	}