diff --git a/mmcv/ops/csrc/pytorch/npu/bbox_overlaps_npu.cpp b/mmcv/ops/csrc/pytorch/npu/bbox_overlaps_npu.cpp
index ed04622af6..3e346e7337 100644
--- a/mmcv/ops/csrc/pytorch/npu/bbox_overlaps_npu.cpp
+++ b/mmcv/ops/csrc/pytorch/npu/bbox_overlaps_npu.cpp
@@ -1,3 +1,4 @@
+#include "common_util.h"
 #include "pytorch_npu_helper.hpp"
 
 using namespace NPU_NAME_SPACE;
diff --git a/mmcv/ops/csrc/pytorch/npu/common_util.h b/mmcv/ops/csrc/pytorch/npu/common_util.h
index db05e6a05c..2092763860 100644
--- a/mmcv/ops/csrc/pytorch/npu/common_util.h
+++ b/mmcv/ops/csrc/pytorch/npu/common_util.h
@@ -2,11 +2,4 @@
 #define MMCV_OPS_CSRC_COMMON__UTIL_HPP_
 const int SIZE = 8;
 
-c10::SmallVector<int64_t, SIZE> array_to_vector(c10::IntArrayRef shape) {
-  c10::SmallVector<int64_t, SIZE> shape_small_vec;
-  for (uint64_t i = 0; i < shape.size(); i++) {
-    shape_small_vec.emplace_back(shape[i]);
-  }
-}
-
 #endif  // MMCV_OPS_CSRC_COMMON__UTIL_HPP_
diff --git a/mmcv/ops/csrc/pytorch/npu/fused_bias_leakyrelu_npu.cpp b/mmcv/ops/csrc/pytorch/npu/fused_bias_leakyrelu_npu.cpp
index 2e1270e450..e8cd552ef7 100644
--- a/mmcv/ops/csrc/pytorch/npu/fused_bias_leakyrelu_npu.cpp
+++ b/mmcv/ops/csrc/pytorch/npu/fused_bias_leakyrelu_npu.cpp
@@ -1,3 +1,4 @@
+#include "common_util.h"
 #include "pytorch_npu_helper.hpp"
 
 using namespace NPU_NAME_SPACE;
diff --git a/mmcv/ops/csrc/pytorch/npu/nms_npu.cpp b/mmcv/ops/csrc/pytorch/npu/nms_npu.cpp
index 5638c8be38..a7fbebee93 100644
--- a/mmcv/ops/csrc/pytorch/npu/nms_npu.cpp
+++ b/mmcv/ops/csrc/pytorch/npu/nms_npu.cpp
@@ -1,3 +1,4 @@
+#include "common_util.h"
 #include "pytorch_npu_helper.hpp"
 
 using namespace NPU_NAME_SPACE;
diff --git a/mmcv/ops/csrc/pytorch/npu/nms_rotated_npu.cpp b/mmcv/ops/csrc/pytorch/npu/nms_rotated_npu.cpp
index 717f954cff..1b2107eb99 100644
--- a/mmcv/ops/csrc/pytorch/npu/nms_rotated_npu.cpp
+++ b/mmcv/ops/csrc/pytorch/npu/nms_rotated_npu.cpp
@@ -1,3 +1,4 @@
+#include "common_util.h"
 #include "pytorch_npu_helper.hpp"
 
 using namespace NPU_NAME_SPACE;
diff --git a/mmcv/ops/csrc/pytorch/npu/roi_align_npu.cpp b/mmcv/ops/csrc/pytorch/npu/roi_align_npu.cpp
index 0e673614fa..b1edd88865 100644
--- a/mmcv/ops/csrc/pytorch/npu/roi_align_npu.cpp
+++ b/mmcv/ops/csrc/pytorch/npu/roi_align_npu.cpp
@@ -1,3 +1,4 @@
+#include "common_util.h"
 #include "pytorch_npu_helper.hpp"
 
 using namespace NPU_NAME_SPACE;
diff --git a/mmcv/ops/csrc/pytorch/npu/roi_align_rotated_npu.cpp b/mmcv/ops/csrc/pytorch/npu/roi_align_rotated_npu.cpp
index 2a3ff09e98..3d7560f49c 100644
--- a/mmcv/ops/csrc/pytorch/npu/roi_align_rotated_npu.cpp
+++ b/mmcv/ops/csrc/pytorch/npu/roi_align_rotated_npu.cpp
@@ -1,3 +1,4 @@
+#include "common_util.h"
 #include "pytorch_npu_helper.hpp"
 
 using namespace NPU_NAME_SPACE;
diff --git a/mmcv/ops/csrc/pytorch/npu/roipoint_pool3d_forward.cpp b/mmcv/ops/csrc/pytorch/npu/roipoint_pool3d_forward.cpp
index 48d5b4789e..1cf6500eeb 100644
--- a/mmcv/ops/csrc/pytorch/npu/roipoint_pool3d_forward.cpp
+++ b/mmcv/ops/csrc/pytorch/npu/roipoint_pool3d_forward.cpp
@@ -1,3 +1,4 @@
+#include "common_util.h"
 #include "pytorch_npu_helper.hpp"
 
 using namespace NPU_NAME_SPACE;