diff --git a/modules/flann/include/opencv2/flann/kdtree_index.h b/modules/flann/include/opencv2/flann/kdtree_index.h
index ffcbb4625c..7344165e0d 100644
--- a/modules/flann/include/opencv2/flann/kdtree_index.h
+++ b/modules/flann/include/opencv2/flann/kdtree_index.h
@@ -314,6 +314,9 @@ public:
 
 private:
 
+	KDTreeIndex& operator=(const KDTreeIndex&);
+	KDTreeIndex(const KDTreeIndex&);
+
 
     void save_tree(FILE* stream, Tree tree)
     {
diff --git a/modules/flann/include/opencv2/flann/kmeans_index.h b/modules/flann/include/opencv2/flann/kmeans_index.h
index 6c688d808c..67abba5447 100644
--- a/modules/flann/include/opencv2/flann/kmeans_index.h
+++ b/modules/flann/include/opencv2/flann/kmeans_index.h
@@ -596,6 +596,8 @@ public:
 
 private:
 
+	KMeansIndex& operator=(const KMeansIndex&);
+	KMeansIndex(const KMeansIndex&);
 
     void save_tree(FILE* stream, KMeansNode node)
     {
diff --git a/modules/flann/include/opencv2/flann/linear_index.h b/modules/flann/include/opencv2/flann/linear_index.h
index c24cc0643c..3a17ade65e 100644
--- a/modules/flann/include/opencv2/flann/linear_index.h
+++ b/modules/flann/include/opencv2/flann/linear_index.h
@@ -54,6 +54,9 @@ class LinearIndex : public NNIndex<ELEM_TYPE>
 	const Matrix<ELEM_TYPE> dataset;
 	const LinearIndexParams& index_params;
 
+	LinearIndex(const LinearIndex&);
+	LinearIndex& operator=(const LinearIndex&);
+
 public:
 
 	LinearIndex(const Matrix<ELEM_TYPE>& inputData, const LinearIndexParams& params = LinearIndexParams() ) :