diff --git a/proton b/proton
index de967236..d886e903 100755
--- a/proton
+++ b/proton
@@ -1148,6 +1148,7 @@ def default_compat_config():
                 ]:
             ret.add("hideapu")
 
+    #options to also be enabled for prerequisite setup steps
     if "STEAM_COMPAT_APP_ID" in os.environ:
         appid = os.environ["STEAM_COMPAT_APP_ID"]
         if appid in [