diff --git a/corelib/src/opencv/ORBextractor.cc b/corelib/src/opencv/ORBextractor.cc
index a643b33c..5826a7a5 100644
--- a/corelib/src/opencv/ORBextractor.cc
+++ b/corelib/src/opencv/ORBextractor.cc
@@ -67,6 +67,9 @@
 #include <opencv2/features2d/features2d.hpp>
 #include <opencv2/imgproc/imgproc.hpp>
 #include <vector>
+#include <algorithm>
+#include <iterator>
+#include <set>
 
 #include "ORBextractor.h"