diff --git a/python/sglang/srt/speculative/frozen_kv_mtp_worker.py b/python/sglang/srt/speculative/frozen_kv_mtp_worker.py
index b3025987a4ad..dd873cbaa260 100644
--- a/python/sglang/srt/speculative/frozen_kv_mtp_worker.py
+++ b/python/sglang/srt/speculative/frozen_kv_mtp_worker.py
@@ -205,12 +205,14 @@ def _resolve_draft_backend_type(self) -> str:
 
     def _init_draft_attn_backend(self):
         backend_type = self._resolve_draft_backend_type()
-        if backend_type != "triton":
-            raise ValueError(
-                "Frozen-KV MTP currently supports only the triton attention "
-                f"backend, got {backend_type}."
-            )
-        return self._init_triton_draft_attn_backend()
+        if backend_type == "triton":
+            return self._init_triton_draft_attn_backend()
+        if backend_type == "trtllm_mha":
+            return self._init_trtllm_mha_draft_attn_backend()
+        raise ValueError(
+            "Frozen-KV MTP currently supports triton and trtllm_mha attention "
+            f"backends, got {backend_type}."
+        )
 
     def _init_triton_draft_attn_backend(self):
         from sglang.srt.layers.attention.triton_backend import TritonAttnBackend
@@ -225,6 +227,21 @@ def _init_triton_draft_attn_backend(self):
             kv_indptr_buf=kv_indptr_buf,
         )
 
+    def _init_trtllm_mha_draft_attn_backend(self):
+        # TODO(kpham-sgl): trtllm_mha (Gemma4) known gaps:
+        #   1. target=trtllm_mha + num_draft_tokens>=6: flashinfer missing
+        #      tile (tileSizeQ=64, headDim=512, page=64) for target_verify
+        #      on full-attn layers.
+        #   2. target=triton + draft=trtllm_mha: needs --page-size in
+        #      {16,32,64} (triton defaults to 1; no auto-promote for
+        #      draft-only trtllm_mha).
+        #   3. topk>1 + page_size>1 + SWA: eagle verify hits
+        #      `move_kv_cache` w/o enable_kv_cache_copy (orthogonal to
+        #      trtllm_mha but blocks the only triton-target workaround).
+        from sglang.srt.layers.attention.trtllm_mha_backend import TRTLLMHAAttnBackend
+
+        return TRTLLMHAAttnBackend(self.draft_model_runner, skip_prefill=True)
+
     def _bind_kv_context(self) -> None:
         draft_model = self.draft_model_runner.model
         if not hasattr(draft_model, "build_frozen_kv_mtp_context") or not hasattr(