diff --git a/mmcv/ops/csrc/common/cuda/three_nn_vector_pool.cuh b/mmcv/ops/csrc/common/cuda/three_nn_vector_pool_cuda_kernel.cuh
similarity index 98%
rename from mmcv/ops/csrc/common/cuda/three_nn_vector_pool.cuh
rename to mmcv/ops/csrc/common/cuda/three_nn_vector_pool_cuda_kernel.cuh
index d73ce77e41..e60f43ca06 100644
--- a/mmcv/ops/csrc/common/cuda/three_nn_vector_pool.cuh
+++ b/mmcv/ops/csrc/common/cuda/three_nn_vector_pool_cuda_kernel.cuh
@@ -1,5 +1,5 @@
-#ifndef VECTOR_POOL_CUDA_KERNEL_CUH
-#define VECTOR_POOL_CUDA_KERNEL_CUH
+#ifndef THREE_NN_VECTOR_POOL_CUDA_KERNEL_CUH
+#define THREE_NN_VECTOR_POOL_CUDA_KERNEL_CUH
 
 #ifdef MMCV_USE_PARROTS
 #include "parrots_cuda_helper.hpp"
@@ -177,3 +177,4 @@ __global__ void query_three_nn_by_stacked_local_idxs_cuda_kernel(
     cur_new_xyz_grid_idxs[2] = besti3;
   }
 }
+#endif