diff --git a/python/sglang/srt/environ.py b/python/sglang/srt/environ.py
index 7ef525c25..50b854091 100644
--- a/python/sglang/srt/environ.py
+++ b/python/sglang/srt/environ.py
@@ -253,7 +253,7 @@ class Envs:
     SGLANG_DYNAMIC_CHUNKING_SMOOTH_FACTOR = EnvFloat(0.75)
     SGLANG_SCHEDULER_SKIP_ALL_GATHER = EnvBool(False)
     SGLANG_SCHEDULER_DECREASE_PREFILL_IDLE = EnvBool(False)
-    SGLANG_PREFILL_DELAYER_MAX_DELAY_PASSES = EnvInt(30)
+    SGLANG_PREFILL_DELAYER_MAX_DELAY_PASSES = EnvInt(None)
     SGLANG_PREFILL_DELAYER_TOKEN_USAGE_LOW_WATERMARK = EnvFloat(None)
     SGLANG_DATA_PARALLEL_BUDGET_INTERVAL = EnvInt(1)
     SGLANG_REQ_WAITING_TIMEOUT = EnvFloat(-1)  # in seconds