diff --git a/lightllm/server/metrics/metrics.py b/lightllm/server/metrics/metrics.py
index caa816beb..130f32c7a 100644
--- a/lightllm/server/metrics/metrics.py
+++ b/lightllm/server/metrics/metrics.py
@@ -96,6 +96,8 @@ def init_metrics(self, args):
         self.create_histogram("lightllm_cache_ratio", ratio_buckets)
 
         mtp_avg_token_per_step_buckets = [i / 10.0 + 1.0 for i in range(0, 10 * args.mtp_step)]
+        if args.mtp_step == 0:
+            mtp_avg_token_per_step_buckets = [1.0, 2.0]
         self.create_histogram("lightllm_request_mtp_avg_token_per_step", mtp_avg_token_per_step_buckets)
 
     def create_histogram(self, name, buckets, labelnames=None):