diff --git a/modules/gpu/src/cuda/calib3d.cu b/modules/gpu/src/cuda/calib3d.cu
index fedb3504b..13136d9a4 100644
--- a/modules/gpu/src/cuda/calib3d.cu
+++ b/modules/gpu/src/cuda/calib3d.cu
@@ -45,6 +45,8 @@
 
 #define SOLVE_PNP_RANSAC_MAX_NUM_ITERS 200
 
+using namespace cv::gpu::device;
+
 namespace cv { namespace gpu
 {
     namespace transform_points