diff --git a/network_process/src/prim_gen/filter_tet_by_subface.cpp b/network_process/src/prim_gen/filter_tet_by_subface.cpp
index 7f44c3f..b03d9cd 100644
--- a/network_process/src/prim_gen/filter_tet_by_subface.cpp
+++ b/network_process/src/prim_gen/filter_tet_by_subface.cpp
@@ -32,8 +32,7 @@ void filter_tet_by_subface(const btree_map_mp<uint32_t, stl_vector_mp<uint32_t>>
     sign_count_initialized.resize(tetrahedrons.size());
 
     // the highest 4 bits as positive sign count, the lowest 4 bits as negative sign count
-    sign_count_buffer_t temp_sign_counts(vertex_infos.rows());
-    temp_sign_counts += temp_sign_counts;
+    sign_count_buffer_t temp_sign_counts(vertex_infos.cols());
     for (const auto& [vertex_index, tet_indices] : vertex_to_tet_mapping) {
         auto vertex_info = vertex_infos.row(vertex_index);