diff --git a/python/sglang/srt/environ.py b/python/sglang/srt/environ.py
index 6cf331007..e6c526451 100644
--- a/python/sglang/srt/environ.py
+++ b/python/sglang/srt/environ.py
@@ -668,7 +668,7 @@ class Envs:
     SGLANG_USE_FUSED_METADATA_COPY = EnvBool(True)
     SGLANG_DSA_USE_FUSED_METADATA_GENERATION = EnvBool(True)
     SGLANG_DSA_TOPK_BROADCAST = EnvBool(False)
-    SGLANG_DISABLE_DSA_INDEXER_FUSION = EnvBool(False)
+    SGLANG_DISABLE_DSA_INDEXER_FUSION = EnvBool(True)
 
     # sgl-kernel
     SGLANG_SKIP_SGL_KERNEL_VERSION_CHECK = EnvBool(False)