diff --git a/modules/ocl/perf/perf_matrix_operation.cpp b/modules/ocl/perf/perf_matrix_operation.cpp
index b2d9a7ef10..f2baa7ffc5 100644
--- a/modules/ocl/perf/perf_matrix_operation.cpp
+++ b/modules/ocl/perf/perf_matrix_operation.cpp
@@ -156,6 +156,8 @@ PERF_TEST_P(setToFixture, setTo,
         OCL_PERF_ELSE
 }
 
+#if 0
+
 /////////////////// upload ///////////////////////////
 
 typedef tuple<Size, MatDepth, int> uploadParams;
@@ -228,3 +230,5 @@ PERF_TEST_P(downloadFixture, download,
 
     SANITY_CHECK_NOTHING();
 }
+
+#endif
diff --git a/modules/ocl/src/arithm.cpp b/modules/ocl/src/arithm.cpp
index ea2eff63fc..9b24b16b0b 100644
--- a/modules/ocl/src/arithm.cpp
+++ b/modules/ocl/src/arithm.cpp
@@ -688,7 +688,7 @@ double cv::ocl::norm(const oclMat &src1, const oclMat &src2, int normType)
         break;
     }
     if (isRelative)
-        r = r / norm(src2, normType);
+        r = r / (norm(src2, normType) + DBL_EPSILON);
 
     return r;
 }