diff --git a/aruco_pose/src/draw.cpp b/aruco_pose/src/draw.cpp
index a2d5f35f..7bd593d4 100644
--- a/aruco_pose/src/draw.cpp
+++ b/aruco_pose/src/draw.cpp
@@ -3,6 +3,9 @@
 
 #include "draw.h"
 
+using namespace cv;
+using namespace cv::aruco;
+
 void drawPlanarBoard(Board *_board, Size outSize, OutputArray _img, int marginSize,
                      int borderBits) {
 
diff --git a/aruco_pose/src/draw.h b/aruco_pose/src/draw.h
index c0cc8297..ce9d41d4 100644
--- a/aruco_pose/src/draw.h
+++ b/aruco_pose/src/draw.h
@@ -3,7 +3,4 @@
 #include <opencv2/opencv.hpp>
 #include <opencv2/aruco.hpp>
 
-using namespace cv;
-using namespace cv::aruco;
-
-void drawPlanarBoard(Board *_board, Size outSize, OutputArray _img, int marginSize, int borderBits);
+void drawPlanarBoard(cv::aruco::Board *_board, cv::Size outSize, cv::OutputArray _img, int marginSize, int borderBits);