diff --git a/modules/core/include/opencv2/core/base.hpp b/modules/core/include/opencv2/core/base.hpp
index 8559fc2397..f2acaa3fb4 100644
--- a/modules/core/include/opencv2/core/base.hpp
+++ b/modules/core/include/opencv2/core/base.hpp
@@ -727,8 +727,6 @@ CV_EXPORTS void setUseIPP(bool flag);
 
 } // ipp
 
-CV_EXPORTS void setUseOptimizations(bool enabled);
-
 //! @endcond
 
 //! @} core_utils
diff --git a/modules/core/src/system.cpp b/modules/core/src/system.cpp
index 6152cbe702..c67a78745d 100644
--- a/modules/core/src/system.cpp
+++ b/modules/core/src/system.cpp
@@ -385,6 +385,12 @@ void setUseOptimized( bool flag )
     useOptimizedFlag = flag;
     currentFeatures = flag ? &featuresEnabled : &featuresDisabled;
     USE_SSE2 = currentFeatures->have[CV_CPU_SSE2];
+
+    ipp::setUseIPP(flag);
+    ocl::setUseOpenCL(flag);
+#ifdef HAVE_TEGRA_OPTIMIZATION
+    ::tegra::setUseTegra(flag);
+#endif
 }
 
 bool useOptimized(void)
@@ -1289,17 +1295,4 @@ void setUseTegra(bool flag)
 
 #endif
 
-namespace cv {
-
-void setUseOptimizations(bool enabled)
-{
-    ipp::setUseIPP(enabled);
-    ocl::setUseOpenCL(enabled);
-#ifdef HAVE_TEGRA_OPTIMIZATION
-    ::tegra::setUseTegra(enabled);
-#endif
-}
-
-} // namespace cv
-
 /* End of file. */
diff --git a/modules/ts/include/opencv2/ts/cuda_test.hpp b/modules/ts/include/opencv2/ts/cuda_test.hpp
index d1e1e9db73..8783fb6412 100644
--- a/modules/ts/include/opencv2/ts/cuda_test.hpp
+++ b/modules/ts/include/opencv2/ts/cuda_test.hpp
@@ -352,7 +352,7 @@ namespace cv { namespace cuda
 #ifdef HAVE_CUDA
 
 #define CV_CUDA_TEST_MAIN(resourcesubdir) \
-    CV_TEST_MAIN(resourcesubdir, cvtest::parseCudaDeviceOptions(argc, argv), cvtest::printCudaInfo(), cv::setUseOptimizations(false))
+    CV_TEST_MAIN(resourcesubdir, cvtest::parseCudaDeviceOptions(argc, argv), cvtest::printCudaInfo(), cv::setUseOptimized(false))
 
 #else // HAVE_CUDA