diff --git a/python/sglang/srt/utils.py b/python/sglang/srt/utils.py
index b31f2a5ec..0318f3bd4 100644
--- a/python/sglang/srt/utils.py
+++ b/python/sglang/srt/utils.py
@@ -2345,6 +2345,7 @@ def is_fa3_default_architecture(hf_config):
         "Qwen3ForCausalLM",
         "Qwen3MoeForCausalLM",
         "Glm4MoeForCausalLM",
+        "Glm4vMoeForConditionalGeneration",
         "Step3VLForConditionalGeneration",
     }
     return architectures[0] in default_archs