diff --git a/modules/objdetect/include/opencv2/objdetect/objdetect.hpp b/modules/objdetect/include/opencv2/objdetect/objdetect.hpp
index 3115a8650..c836b5b48 100644
--- a/modules/objdetect/include/opencv2/objdetect/objdetect.hpp
+++ b/modules/objdetect/include/opencv2/objdetect/objdetect.hpp
@@ -325,7 +325,7 @@ private:
     enum { DO_CANNY_PRUNING = 1, SCALE_IMAGE = 2,
            FIND_BIGGEST_OBJECT = 4, DO_ROUGH_SEARCH = 8 };
 
-    friend class CascadeClassifierInvoker;
+    friend struct CascadeClassifierInvoker;
 
     template<class FEval>
     friend int predictOrdered( CascadeClassifier& cascade, Ptr<FeatureEvaluator> &featureEvaluator);