diff --git a/modules/objdetect/include/opencv2/objdetect/objdetect.hpp b/modules/objdetect/include/opencv2/objdetect/objdetect.hpp
index e3307c995c..0a07e32f3c 100644
--- a/modules/objdetect/include/opencv2/objdetect/objdetect.hpp
+++ b/modules/objdetect/include/opencv2/objdetect/objdetect.hpp
@@ -411,7 +411,7 @@ protected:
     enum { DO_CANNY_PRUNING = 1, SCALE_IMAGE = 2,
            FIND_BIGGEST_OBJECT = 4, DO_ROUGH_SEARCH = 8 };
 
-    friend struct CascadeClassifierInvoker;
+    friend class CascadeClassifierInvoker;
 
     template<class FEval>
     friend int predictOrdered( CascadeClassifier& cascade, Ptr<FeatureEvaluator> &featureEvaluator, double& weight);