diff --git a/server/text_generation_server/utils/logits_process.py b/server/text_generation_server/utils/logits_process.py
index ec2813a1..d53f070c 100644
--- a/server/text_generation_server/utils/logits_process.py
+++ b/server/text_generation_server/utils/logits_process.py
@@ -501,7 +501,7 @@ class GrammarLogitProcessor(LogitsProcessor):
         allowed_tokens = self.fsm.get_next_instruction(fsm_grammar_state).tokens
         mask = torch.full_like(logits, -math.inf)
         if allowed_tokens is not None:
-	    mask[:, allowed_tokens] = 0
+            mask[:, allowed_tokens] = 0
         biased_scores = logits + mask
         return biased_scores