diff --git a/prompting/validators/reward/blacklist.py b/prompting/validators/reward/blacklist.py
index 8bf8dd0..77b68b9 100644
--- a/prompting/validators/reward/blacklist.py
+++ b/prompting/validators/reward/blacklist.py
@@ -302,7 +302,7 @@ def reward(self, prompt: str, completion: str, name: str) -> BlacklistRewardEven
                 and fuzz.partial_ratio(ngram, completion.lower())
                 > self.partial_ratio_boundary
             ):
-                reward_event.reward = 1
+                reward_event.reward = 0
                 reward_event.matched_ngram = ngram
                 reward_event.significance_score = score
                 return reward_event