diff --git a/utils.h b/utils.h
index e4bf1d1..5b3d736 100644
--- a/utils.h
+++ b/utils.h
@@ -88,7 +88,7 @@ gpt_vocab::id llama_sample_top_p_top_k(
         std::mt19937 & rng);
 
 // filer to top K tokens from list of logits
-void sample_top_k(std::vector<std::pair<double, gpt_vocab::id>> &logits_id, int top_k);
+void sample_top_k(std::vector<std::pair<double, gpt_vocab::id>> & logits_id, int top_k);
 
 //
 // Quantization