diff --git a/cardgame.c65 b/cardgame.c65
index 7f80206..1999f20 100644
--- a/cardgame.c65
+++ b/cardgame.c65
@@ -1,6 +1,9 @@
 #INCLUDE <c64start.c65>
 #INCLUDE <c64defs.c65>
 
+#PRAGMA _P_USE_IMMUTABLE_CODE 1
+#PRAGMA _P_REMOVE_UNUSED 1
+
 //#DEFINE MOUSE_NO_SMOOTHING 1
 
 // Enable test game setups (comment out for release build)
diff --git a/gameloop.c65 b/gameloop.c65
index 2b24b51..68d2665 100644
--- a/gameloop.c65
+++ b/gameloop.c65
@@ -530,7 +530,6 @@ FEND
 // ============================================================================
 FUNC render_pile_by_id({BYTE pile_id})
   WORD pile_ptr @ $92
-  WORD screen_offset
 
   pile_id_to_pointer(pile_id, pile_ptr)
   IF pile_ptr == 0