diff --git a/source/games/duke/src/game.cpp b/source/games/duke/src/game.cpp
index a4cef69ee..aa05e365f 100644
--- a/source/games/duke/src/game.cpp
+++ b/source/games/duke/src/game.cpp
@@ -275,6 +275,11 @@ static void setupbackdrop()
 		defineSky(212, 65536, 3, pskyoff, 0, 140);
 		defineSky(225, 65536, 3, pskyoff, 0, 140);
 	}
+
+	if (isWW2GI() && (g_gameType & GAMEFLAG_ADDON))
+	{
+		defineSky(1086, 65536, 3, pskyoff, 0, 140);
+	}
 }
 
 //---------------------------------------------------------------------------