diff --git a/modules/core/src/opencl/reduce.cl b/modules/core/src/opencl/reduce.cl
index f16a742e545b10fbf1702621f1645949f354907f..c89f1cf0055225b84806455c31b178ec8515d818 100644
--- a/modules/core/src/opencl/reduce.cl
+++ b/modules/core/src/opencl/reduce.cl
@@ -379,7 +379,7 @@
 #define REDUCE_GLOBAL \
     dstTK temp = convertToDT(loadpix(srcptr + src_index)); \
     dstTK temp2 = convertToDT(loadpix(src2ptr + src2_index)); \
-    temp = SUM_ABS2(temp, temp2)); \
+    temp = SUM_ABS2(temp, temp2); \
     FUNC(accumulator, temp.s0); \
     FUNC(accumulator, temp.s1); \
     FUNC(accumulator, temp.s2); \
diff --git a/modules/core/src/stat.cpp b/modules/core/src/stat.cpp
index 48d85900d9f575c7b52ec72bce7494820b5819ab..a26d3345c371fb49d23f40211221c93871e9517a 100644
--- a/modules/core/src/stat.cpp
+++ b/modules/core/src/stat.cpp
@@ -479,9 +479,10 @@ static bool ocl_sum( InputArray _src, Scalar & res, int sum_op, InputArray _mask
         haveMask = _mask.kind() != _InputArray::NONE,
         haveSrc2 = _src2.kind() != _InputArray::NONE;
     int type = _src.type(), depth = CV_MAT_DEPTH(type), cn = CV_MAT_CN(type),
-            kercn = cn == 1 && !haveMask ? ocl::predictOptimalVectorWidth(_src) : 1,
+            kercn = cn == 1 && !haveMask ? ocl::predictOptimalVectorWidth(_src, _src2) : 1,
             mcn = std::max(cn, kercn);
     CV_Assert(!haveSrc2 || _src2.type() == type);
+    int convert_cn = haveSrc2 ? mcn : cn;
 
     if ( (!doubleSupport && depth == CV_64F) || cn > 4 )
         return false;
@@ -513,7 +514,7 @@ static bool ocl_sum( InputArray _src, Scalar & res, int sum_op, InputArray _mask
                          haveMask && _mask.isContinuous() ? " -D HAVE_MASK_CONT" : "", kercn,
                          haveSrc2 ? " -D HAVE_SRC2" : "", calc2 ? " -D OP_CALC2" : "",
                          haveSrc2 && _src2.isContinuous() ? " -D HAVE_SRC2_CONT" : "",
-                         depth <= CV_32S && ddepth == CV_32S ? ocl::convertTypeStr(CV_8U, ddepth, mcn, cvt[1]) : "noconvert");
+                         depth <= CV_32S && ddepth == CV_32S ? ocl::convertTypeStr(CV_8U, ddepth, convert_cn, cvt[1]) : "noconvert");
 
     ocl::Kernel k("reduce", ocl::core::reduce_oclsrc, opts);
     if (k.empty())