diff --git a/mmcv/ops/csrc/pytorch/npu/ms_deform_attn_npu.cpp b/mmcv/ops/csrc/pytorch/npu/ms_deform_attn_npu.cpp
index 48b53d4bc8b..9d680221e27 100644
--- a/mmcv/ops/csrc/pytorch/npu/ms_deform_attn_npu.cpp
+++ b/mmcv/ops/csrc/pytorch/npu/ms_deform_attn_npu.cpp
@@ -134,4 +134,3 @@ void ms_deform_attn_backward_npu(const Tensor &value, const Tensor &spatial_shap
 }
 
 REGISTER_NPU_IMPL(ms_deform_attn_impl_backward, ms_deform_attn_backward_npu);
-