diff --git a/modules/ocl/src/brute_force_matcher.cpp b/modules/ocl/src/brute_force_matcher.cpp
index 20c9ebf57c..440a3101ff 100644
--- a/modules/ocl/src/brute_force_matcher.cpp
+++ b/modules/ocl/src/brute_force_matcher.cpp
@@ -44,7 +44,7 @@
 //M*/
 
 #include "precomp.hpp"
-
+#include <functional>
 #include <iterator>
 #include <vector>
 using namespace cv;