diff --git a/python/sglang/srt/environ.py b/python/sglang/srt/environ.py
index 94d1e5a2e..cf517603d 100644
--- a/python/sglang/srt/environ.py
+++ b/python/sglang/srt/environ.py
@@ -212,7 +212,7 @@ class Envs:
     SGLANG_CP_SHARED_KV_ENABLE_MLA_PREFETCH = EnvBool(False)
     SGLANG_CP_SHARED_KV_LOG_MLA_PREFETCH = EnvBool(False)
     SGLANG_CP_SHARED_KV_MATERIALIZE_NVTX = EnvBool(False)
-    SGLANG_CP_SHARED_KV_MLA_PREFETCH_MIN_PREFIX_TOKENS = EnvInt(1024)
+    SGLANG_CP_SHARED_KV_MLA_PREFETCH_MIN_PREFIX_TOKENS = EnvInt(512)
     SGLANG_CP_SHARED_KV_MLA_PREFETCH_MIN_PREFIX_PAGES = EnvInt(-1)
     SGLANG_CP_DRAFT_SHARED_KV = EnvBool(False)
     SGLANG_CP_DRAFT_SHARED_KV_DEBUG = EnvBool(False)