diff --git a/python/sglang/srt/layers/attention/flashinfer_backend.py b/python/sglang/srt/layers/attention/flashinfer_backend.py
index 302d88f7c..ecebcf76d 100644
--- a/python/sglang/srt/layers/attention/flashinfer_backend.py
+++ b/python/sglang/srt/layers/attention/flashinfer_backend.py
@@ -161,6 +161,10 @@ class FlashInferAttnBackend(AttentionBackend):
             "Qwen2ForCausalLM" in model_runner.model_config.hf_config.architectures
             or "Qwen3ForCausalLM" in model_runner.model_config.hf_config.architectures
             or "MiMoForCausalLM" in model_runner.model_config.hf_config.architectures
+            or "Qwen3VLForConditionalGeneration"
+            in model_runner.model_config.hf_config.architectures
+            or "Qwen3VLMoeForConditionalGeneration"
+            in model_runner.model_config.hf_config.architectures
         ):
             envs.SGLANG_FLASHINFER_WORKSPACE_SIZE.set(512 * 1024 * 1024)