diff --git a/lutris/game.py b/lutris/game.py
index 9f11983f4..145e2f53d 100644
--- a/lutris/game.py
+++ b/lutris/game.py
@@ -677,6 +677,7 @@ class Game(GObject.Object):
         command, env = get_launch_parameters(self.runner, gameplay_info)
         env["game_name"] = self.name  # What is this used for??
         env["GAMEID"] = proton.get_game_id(self)
+        env["STORE"] = self.service if self.service != "humblebundle" else "humble"
         self.game_runtime_config = {
             "args": command,
             "env": env,
diff --git a/lutris/util/wine/proton.py b/lutris/util/wine/proton.py
index c6a17949e..c048eb979 100644
--- a/lutris/util/wine/proton.py
+++ b/lutris/util/wine/proton.py
@@ -1,6 +1,6 @@
 """Utility module to deal with Proton and ULWGL"""
-import os
 import json
+import os
 from typing import Generator, List
 
 from lutris import settings
@@ -108,5 +108,5 @@ def get_game_id(game):
             )
             and ulwgl_game["appid"] == game.appid
         ):
-            return ulwgl_game["ulwgl_id"].upper()
+            return ulwgl_game["ulwgl_id"]
     return default_id