diff --git a/modules/core/include/opencv2/core/cvstd.inl.hpp b/modules/core/include/opencv2/core/cvstd.inl.hpp
index faa7fdb0d8..724f2f3815 100644
--- a/modules/core/include/opencv2/core/cvstd.inl.hpp
+++ b/modules/core/include/opencv2/core/cvstd.inl.hpp
@@ -198,7 +198,7 @@ std::ostream& operator << (std::ostream& out, const std::vector<Point3_<_Tp> >&
 template<typename _Tp, int m, int n> static inline
 std::ostream& operator << (std::ostream& out, const Matx<_Tp, m, n>& matx)
 {
-    return out << Formatter::get()->format(matx);
+    return out << Formatter::get()->format(Mat(matx));
 }
 
 template<typename _Tp> static inline