diff --git a/modules/contrib/src/ba.cpp b/modules/contrib/src/ba.cpp
index 80047877b4..0e2afd95bb 100644
--- a/modules/contrib/src/ba.cpp
+++ b/modules/contrib/src/ba.cpp
@@ -744,7 +744,7 @@ static void fjac(int /*i*/, int /*j*/, CvMat *point_params, CvMat* cam_params, C
   CvMat* _mp = cvCreateMat(1, 1, CV_64FC2 ); //projection of the point
 
   //split camera params into different matrices
-  CvMat _ri, _ti, _k;
+  CvMat _ri, _ti, _k = cvMat(0, 0, CV_64F, NULL); // dummy initialization to fix warning of cl.exe
   cvGetRows( cam_params, &_ri, 0, 3 );
   cvGetRows( cam_params, &_ti, 3, 6 );
 
diff --git a/modules/imgproc/src/histogram.cpp b/modules/imgproc/src/histogram.cpp
index bfcdee515f..da39ca9b33 100644
--- a/modules/imgproc/src/histogram.cpp
+++ b/modules/imgproc/src/histogram.cpp
@@ -270,6 +270,8 @@ public:
     }
 
 private:
+    calcHist1D_Invoker operator=(const calcHist1D_Invoker&);
+
     T* p_[one];
     uchar* mask_;
     int step_[one];
@@ -342,6 +344,8 @@ public:
     }
 
 private:
+    calcHist2D_Invoker operator=(const calcHist2D_Invoker&);
+
     T* p_[two];
     uchar* mask_;
     int step_[two];
@@ -432,6 +436,8 @@ public:
     }
 
 private:
+    calcHist3D_Invoker operator=(const calcHist3D_Invoker&);
+
     T* p_[three];
     uchar* mask_;
     int step_[three];