diff --git a/modules/core/src/matrix.cpp b/modules/core/src/matrix.cpp
index 210126b427..7fa0c2e229 100644
--- a/modules/core/src/matrix.cpp
+++ b/modules/core/src/matrix.cpp
@@ -2456,6 +2456,8 @@ public:
     }
 
 private:
+    KMeansPPDistanceComputer& operator=(const KMeansPPDistanceComputer&); // to quiet MSVC
+
     float *tdist2;
     const float *data;
     const float *dist;