diff --git a/modules/core/src/ocl.cpp b/modules/core/src/ocl.cpp
index e3cfd8e7c..672b9cb03 100644
--- a/modules/core/src/ocl.cpp
+++ b/modules/core/src/ocl.cpp
@@ -60,7 +60,11 @@
 // TODO Move to some common place
 static size_t getConfigurationParameterForSize(const char* name, size_t defaultValue)
 {
+#ifdef HAVE_WINRT
+    const char* envValue = NULL;
+#else
     const char* envValue = getenv(name);
+#endif
     if (envValue == NULL)
     {
         return defaultValue;
@@ -685,12 +689,14 @@ static void* initOpenCLAndLoad(const char* funcname)
     static HMODULE handle = 0;
     if (!handle)
     {
+#ifndef HAVE_WINRT
         if(!initialized)
         {
             handle = LoadLibraryA("OpenCL.dll");
             initialized = true;
             g_haveOpenCL = handle != 0 && GetProcAddress(handle, oclFuncToCheck) != 0;
         }
+#endif
         if(!handle)
             return 0;
     }
@@ -2145,6 +2151,12 @@ static bool parseOpenCLDeviceConfiguration(const std::string& configurationStr,
     return true;
 }
 
+#ifdef HAVE_WINRT
+static cl_device_id selectOpenCLDevice()
+{
+    return NULL;
+}
+#else
 static cl_device_id selectOpenCLDevice()
 {
     std::string platform, deviceName;
@@ -2289,6 +2301,7 @@ not_found:
     CV_Error(CL_INVALID_DEVICE, "Requested OpenCL device is not found");
     return NULL;
 }
+#endif
 
 struct Context::Impl
 {
diff --git a/modules/core/src/system.cpp b/modules/core/src/system.cpp
index 6296fe518..705f53e41 100644
--- a/modules/core/src/system.cpp
+++ b/modules/core/src/system.cpp
@@ -442,27 +442,23 @@ String format( const char* fmt, ... )
 
 String tempfile( const char* suffix )
 {
-#ifdef HAVE_WINRT
-    std::wstring temp_dir = L"";
-    const wchar_t* opencv_temp_dir = _wgetenv(L"OPENCV_TEMP_PATH");
-    if (opencv_temp_dir)
-        temp_dir = std::wstring(opencv_temp_dir);
-#else
-    const char *temp_dir = getenv("OPENCV_TEMP_PATH");
     String fname;
+#ifndef HAVE_WINRT
+    const char *temp_dir = getenv("OPENCV_TEMP_PATH");
 #endif
 
 #if defined WIN32 || defined _WIN32
 #ifdef HAVE_WINRT
     RoInitialize(RO_INIT_MULTITHREADED);
-    std::wstring temp_dir2;
-    if (temp_dir.empty())
-        temp_dir = GetTempPathWinRT();
+    std::wstring temp_dir = L"";
+    const wchar_t* opencv_temp_dir = GetTempPathWinRT().c_str();
+    if (opencv_temp_dir)
+        temp_dir = std::wstring(opencv_temp_dir);
 
     std::wstring temp_file;
     temp_file = GetTempFileNameWinRT(L"ocv");
     if (temp_file.empty())
-        return std::string();
+        return String();
 
     temp_file = temp_dir + std::wstring(L"\\") + temp_file;
     DeleteFileW(temp_file.c_str());
@@ -470,7 +466,7 @@ String tempfile( const char* suffix )
     char aname[MAX_PATH];
     size_t copied = wcstombs(aname, temp_file.c_str(), MAX_PATH);
     CV_Assert((copied != MAX_PATH) && (copied != (size_t)-1));
-    fname = std::string(aname);
+    fname = String(aname);
     RoUninitialize();
 #else
     char temp_dir2[MAX_PATH] = { 0 };
diff --git a/modules/objdetect/src/matching.cpp b/modules/objdetect/src/matching.cpp
index 87ad8382f..871c9e61c 100644
--- a/modules/objdetect/src/matching.cpp
+++ b/modules/objdetect/src/matching.cpp
@@ -525,7 +525,9 @@ int addNullableBorder(CvLSVMFeatureMap *map, int bx, int by)
     float *new_map;
     sizeX = map->sizeX + 2 * bx;
     sizeY = map->sizeY + 2 * by;
-    new_map = (float *)malloc(sizeof(float) * sizeX * sizeY * map->numFeatures);
+    // fix for Windows Phone 8 ARM compiler
+    size_t size = sizeof(float) * sizeX * sizeY * map->numFeatures;
+    new_map = (float *)malloc(size);
     for (i = 0; i < sizeX * sizeY * map->numFeatures; i++)
     {
         new_map[i] = 0.0;