diff --git a/pokemonred_puffer/environment.py b/pokemonred_puffer/environment.py
index fd3e70a..de38e26 100644
--- a/pokemonred_puffer/environment.py
+++ b/pokemonred_puffer/environment.py
@@ -780,7 +780,7 @@ def update_tm_hm_moves_obtained(self):
         # Scan party
         for i in range(self.read_m("wPartyCount")):
             _, addr = self.pyboy.symbol_lookup(f"wPartyMon{i+1}Moves")
-            for move_id in self.pyboy.memory[addr : addr + 4] in TM_HM_MOVES:
+            for move_id in self.pyboy.memory[addr : addr + 4]:
                 if move_id in TM_HM_MOVES:
                     self.moves_obtained[move_id] = 1
         """