diff --git a/perception/probabilistic_occupancy_grid_map/include/autoware/probabilistic_occupancy_grid_map/utils/utils.hpp b/perception/probabilistic_occupancy_grid_map/include/autoware/probabilistic_occupancy_grid_map/utils/utils.hpp
index 50b470d904ef6..a8288d2720f48 100644
--- a/perception/probabilistic_occupancy_grid_map/include/autoware/probabilistic_occupancy_grid_map/utils/utils.hpp
+++ b/perception/probabilistic_occupancy_grid_map/include/autoware/probabilistic_occupancy_grid_map/utils/utils.hpp
@@ -97,6 +97,8 @@ void transformPointcloud(
   const sensor_msgs::msg::PointCloud2 & input, const geometry_msgs::msg::Pose & pose,
   sensor_msgs::msg::PointCloud2 & output);
 
+Eigen::Matrix4f getTransformMatrix(const geometry_msgs::msg::Pose & pose);
+
 bool cropPointcloudByHeight(
   const sensor_msgs::msg::PointCloud2 & input, const tf2_ros::Buffer & tf2,
   const std::string & target_frame, const float min_height, const float max_height,