diff --git a/modules/features2d/doc/object_categorization.rst b/modules/features2d/doc/object_categorization.rst
index 9ec1bf8454..f387866c5b 100644
--- a/modules/features2d/doc/object_categorization.rst
+++ b/modules/features2d/doc/object_categorization.rst
@@ -130,10 +130,10 @@ The class declaration is the following: ::
             void setVocabulary( const Mat& vocabulary );
             const Mat& getVocabulary() const;
             void compute( InputArray image, vector<KeyPoint>& keypoints,
-                          InputOutputArray imgDescriptor,
+                          OutputArray imgDescriptor,
                           vector<vector<int> >* pointIdxsOfClusters=0,
                           Mat* descriptors=0 );
-            void compute( InputArray descriptors, InputOutputArray imgDescriptor,
+            void compute( InputArray descriptors, OutputArray imgDescriptor,
                           std::vector<std::vector<int> >* pointIdxsOfClusters=0 );
             int descriptorSize() const;
             int descriptorType() const;
@@ -180,8 +180,8 @@ BOWImgDescriptorExtractor::compute
 --------------------------------------
 Computes an image descriptor using the set visual vocabulary.
 
-.. ocv:function:: void BOWImgDescriptorExtractor::compute( InputArray image, vector<KeyPoint>& keypoints, InputOutputArray imgDescriptor, vector<vector<int> >* pointIdxsOfClusters=0, Mat* descriptors=0 )
-.. ocv:function:: void BOWImgDescriptorExtractor::compute( InputArray keypointDescriptors, InputOutputArray imgDescriptor, std::vector<std::vector<int> >* pointIdxsOfClusters=0 )
+.. ocv:function:: void BOWImgDescriptorExtractor::compute( InputArray image, vector<KeyPoint>& keypoints, OutputArray imgDescriptor, vector<vector<int> >* pointIdxsOfClusters=0, Mat* descriptors=0 )
+.. ocv:function:: void BOWImgDescriptorExtractor::compute( InputArray keypointDescriptors, OutputArray imgDescriptor, std::vector<std::vector<int> >* pointIdxsOfClusters=0 )
 
     :param image: Image, for which the descriptor is computed.
 
diff --git a/modules/features2d/include/opencv2/features2d.hpp b/modules/features2d/include/opencv2/features2d.hpp
index eb380ceb46..98e6e04bea 100644
--- a/modules/features2d/include/opencv2/features2d.hpp
+++ b/modules/features2d/include/opencv2/features2d.hpp
@@ -1518,9 +1518,9 @@ public:
 
     void setVocabulary( const Mat& vocabulary );
     const Mat& getVocabulary() const;
-    void compute( InputArray image, std::vector<KeyPoint>& keypoints, InputOutputArray imgDescriptor,
+    void compute( InputArray image, std::vector<KeyPoint>& keypoints, OutputArray imgDescriptor,
                   std::vector<std::vector<int> >* pointIdxsOfClusters=0, Mat* descriptors=0 );
-    void compute( InputArray keypointDescriptors, InputOutputArray imgDescriptor,
+    void compute( InputArray keypointDescriptors, OutputArray imgDescriptor,
                   std::vector<std::vector<int> >* pointIdxsOfClusters=0 );
     // compute() is not constant because DescriptorMatcher::match is not constant
 
diff --git a/modules/features2d/src/bagofwords.cpp b/modules/features2d/src/bagofwords.cpp
index c7cc5decf2..1bb345e284 100644
--- a/modules/features2d/src/bagofwords.cpp
+++ b/modules/features2d/src/bagofwords.cpp
@@ -140,7 +140,7 @@ const Mat& BOWImgDescriptorExtractor::getVocabulary() const
     return vocabulary;
 }
 
-void BOWImgDescriptorExtractor::compute( InputArray image, std::vector<KeyPoint>& keypoints, InputOutputArray imgDescriptor,
+void BOWImgDescriptorExtractor::compute( InputArray image, std::vector<KeyPoint>& keypoints, OutputArray imgDescriptor,
                                          std::vector<std::vector<int> >* pointIdxsOfClusters, Mat* descriptors )
 {
     imgDescriptor.release();
@@ -170,7 +170,7 @@ int BOWImgDescriptorExtractor::descriptorType() const
     return CV_32FC1;
 }
 
-void BOWImgDescriptorExtractor::compute( InputArray keypointDescriptors, InputOutputArray _imgDescriptor, std::vector<std::vector<int> >* pointIdxsOfClusters )
+void BOWImgDescriptorExtractor::compute( InputArray keypointDescriptors, OutputArray _imgDescriptor, std::vector<std::vector<int> >* pointIdxsOfClusters )
 {
     CV_Assert( vocabulary.empty() != false );
 
diff --git a/modules/features2d/src/descriptors.cpp b/modules/features2d/src/descriptors.cpp
index 964c38e94b..c453190624 100644
--- a/modules/features2d/src/descriptors.cpp
+++ b/modules/features2d/src/descriptors.cpp
@@ -109,7 +109,7 @@ Ptr<DescriptorExtractor> DescriptorExtractor::create(const String& descriptorExt
 }
 
 
-CV_WRAP void Feature2D::compute( InputArray image, CV_OUT CV_IN_OUT std::vector<KeyPoint>& keypoints, CV_OUT OutputArray descriptors ) const
+CV_WRAP void Feature2D::compute( InputArray image, CV_OUT CV_IN_OUT std::vector<KeyPoint>& keypoints, OutputArray descriptors ) const
 {
    DescriptorExtractor::compute(image, keypoints, descriptors);
 }