diff --git a/modules/dnn/include/opencv2/dnn.hpp b/modules/dnn/include/opencv2/dnn.hpp
index 37be989263..7bad7505a0 100644
--- a/modules/dnn/include/opencv2/dnn.hpp
+++ b/modules/dnn/include/opencv2/dnn.hpp
@@ -39,8 +39,8 @@
 //
 //M*/
 
-#ifndef __OPENCV_DNN_HPP__
-#define __OPENCV_DNN_HPP__
+#ifndef OPENCV_DNN_HPP
+#define OPENCV_DNN_HPP
 
 // This is an umbrealla header to include into you project.
 // We are free to change headers layout in dnn subfolder, so please include
@@ -61,4 +61,4 @@
 */
 #include <opencv2/dnn/dnn.hpp>
 
-#endif /* __OPENCV_DNN_HPP__ */
+#endif /* OPENCV_DNN_HPP */
diff --git a/modules/dnn/include/opencv2/dnn/all_layers.hpp b/modules/dnn/include/opencv2/dnn/all_layers.hpp
index a953e813c2..b3e36e9296 100644
--- a/modules/dnn/include/opencv2/dnn/all_layers.hpp
+++ b/modules/dnn/include/opencv2/dnn/all_layers.hpp
@@ -39,8 +39,8 @@
 //
 //M*/
 
-#ifndef __OPENCV_DNN_DNN_ALL_LAYERS_HPP__
-#define __OPENCV_DNN_DNN_ALL_LAYERS_HPP__
+#ifndef OPENCV_DNN_DNN_ALL_LAYERS_HPP
+#define OPENCV_DNN_DNN_ALL_LAYERS_HPP
 #include <opencv2/dnn.hpp>
 
 namespace cv
diff --git a/modules/dnn/include/opencv2/dnn/dict.hpp b/modules/dnn/include/opencv2/dnn/dict.hpp
index 1096cc0ff2..9a7efb7134 100644
--- a/modules/dnn/include/opencv2/dnn/dict.hpp
+++ b/modules/dnn/include/opencv2/dnn/dict.hpp
@@ -39,8 +39,8 @@
 //
 //M*/
 
-#ifndef __OPENCV_DNN_DNN_DICT_HPP__
-#define __OPENCV_DNN_DNN_DICT_HPP__
+#ifndef OPENCV_DNN_DNN_DICT_HPP
+#define OPENCV_DNN_DNN_DICT_HPP
 
 #include <opencv2/core.hpp>
 #include <map>
diff --git a/modules/dnn/include/opencv2/dnn/dnn.hpp b/modules/dnn/include/opencv2/dnn/dnn.hpp
index 7a85da78c2..a705731521 100644
--- a/modules/dnn/include/opencv2/dnn/dnn.hpp
+++ b/modules/dnn/include/opencv2/dnn/dnn.hpp
@@ -39,8 +39,8 @@
 //
 //M*/
 
-#ifndef __OPENCV_DNN_DNN_HPP__
-#define __OPENCV_DNN_DNN_HPP__
+#ifndef OPENCV_DNN_DNN_HPP
+#define OPENCV_DNN_DNN_HPP
 
 #include <vector>
 #include <opencv2/core.hpp>
diff --git a/modules/dnn/include/opencv2/dnn/dnn.inl.hpp b/modules/dnn/include/opencv2/dnn/dnn.inl.hpp
index 8a3c72ee98..0bfde6f515 100644
--- a/modules/dnn/include/opencv2/dnn/dnn.inl.hpp
+++ b/modules/dnn/include/opencv2/dnn/dnn.inl.hpp
@@ -39,8 +39,8 @@
 //
 //M*/
 
-#ifndef __OPENCV_DNN_DNN_INL_HPP__
-#define __OPENCV_DNN_DNN_INL_HPP__
+#ifndef OPENCV_DNN_DNN_INL_HPP
+#define OPENCV_DNN_DNN_INL_HPP
 
 #include <opencv2/dnn.hpp>
 
diff --git a/modules/dnn/include/opencv2/dnn/layer.hpp b/modules/dnn/include/opencv2/dnn/layer.hpp
index af663dd3e1..443b67d89a 100644
--- a/modules/dnn/include/opencv2/dnn/layer.hpp
+++ b/modules/dnn/include/opencv2/dnn/layer.hpp
@@ -39,8 +39,8 @@
 //
 //M*/
 
-#ifndef __OPENCV_DNN_LAYER_HPP__
-#define __OPENCV_DNN_LAYER_HPP__
+#ifndef OPENCV_DNN_LAYER_HPP
+#define OPENCV_DNN_LAYER_HPP
 #include <opencv2/dnn.hpp>
 
 namespace cv
diff --git a/modules/dnn/include/opencv2/dnn/shape_utils.hpp b/modules/dnn/include/opencv2/dnn/shape_utils.hpp
index 7ecc8dd067..d0a16a1b25 100644
--- a/modules/dnn/include/opencv2/dnn/shape_utils.hpp
+++ b/modules/dnn/include/opencv2/dnn/shape_utils.hpp
@@ -39,8 +39,8 @@
 //
 //M*/
 
-#ifndef __OPENCV_DNN_DNN_SHAPE_UTILS_HPP__
-#define __OPENCV_DNN_DNN_SHAPE_UTILS_HPP__
+#ifndef OPENCV_DNN_DNN_SHAPE_UTILS_HPP
+#define OPENCV_DNN_DNN_SHAPE_UTILS_HPP
 
 #include <opencv2/core.hpp>
 #include <opencv2/core/types_c.h>