diff --git a/paddle/phi/kernels/fusion/gpu/qkv_unpack_mha_kernel.cu b/paddle/phi/kernels/fusion/gpu/qkv_unpack_mha_kernel.cu
index e838778952bf41..b2d15a59f8b1c9 100644
--- a/paddle/phi/kernels/fusion/gpu/qkv_unpack_mha_kernel.cu
+++ b/paddle/phi/kernels/fusion/gpu/qkv_unpack_mha_kernel.cu
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#include "paddle/phi/kernels/fusion/gpu/qkv_unpack_mha_kernel.h"
 #include "paddle/phi/core/kernel_registry.h"
 #include "paddle/phi/kernels/funcs/aligned_vector.h"
 #include "paddle/phi/kernels/fusion/gpu/mmha_util.cu.h"
diff --git a/paddle/phi/kernels/fusion/gpu/qkv_unpack_mha_kernel.h b/paddle/phi/kernels/fusion/gpu/qkv_unpack_mha_kernel.h
new file mode 100644
index 00000000000000..34e5c2f24510bc
--- /dev/null
+++ b/paddle/phi/kernels/fusion/gpu/qkv_unpack_mha_kernel.h
@@ -0,0 +1,32 @@
+// Copyright (c) 2023 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include "paddle/phi/core/dense_tensor.h"
+#include "paddle/phi/core/kernel_registry.h"
+
+namespace phi {
+namespace fusion {
+
+template <typename T, typename Context>
+void QKVMMHAKernel(const Context& dev_ctx,
+                   const DenseTensor& q,
+                   const DenseTensor& k,
+                   const DenseTensor& v,
+                   const paddle::optional<DenseTensor>& src_mask,
+                   DenseTensor* out);
+
+}  // namespace fusion
+}  // namespace phi