diff --git a/VisualC/SDL/SDL_VS2012_WinRT.vcxproj b/VisualC/SDL/SDL_VS2012_WinRT.vcxproj
index aedcb381f..cddcbdff9 100644
--- a/VisualC/SDL/SDL_VS2012_WinRT.vcxproj
+++ b/VisualC/SDL/SDL_VS2012_WinRT.vcxproj
@@ -378,7 +378,7 @@
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
       <CompileAsWinRT>false</CompileAsWinRT>
       <AdditionalIncludeDirectories>..\..\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_WINDLL;__WINRT__=1;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_WINDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -392,7 +392,7 @@
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
       <CompileAsWinRT>false</CompileAsWinRT>
       <AdditionalIncludeDirectories>..\..\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_WINDLL;__WINRT__=1;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_WINDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -406,7 +406,7 @@
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
       <CompileAsWinRT>false</CompileAsWinRT>
       <AdditionalIncludeDirectories>..\..\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_WINDLL;__WINRT__=1;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_WINDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -420,7 +420,7 @@
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
       <CompileAsWinRT>false</CompileAsWinRT>
       <AdditionalIncludeDirectories>..\..\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_WINDLL;__WINRT__=1;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_WINDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -434,7 +434,7 @@
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
       <CompileAsWinRT>false</CompileAsWinRT>
       <AdditionalIncludeDirectories>..\..\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_WINDLL;__WINRT__=1;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_WINDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -448,7 +448,7 @@
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
       <CompileAsWinRT>false</CompileAsWinRT>
       <AdditionalIncludeDirectories>..\..\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_WINDLL;__WINRT__=1;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_WINDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
diff --git a/VisualC/tests/loopwave/WinRT/loopwave_VS2012_WinRT.vcxproj b/VisualC/tests/loopwave/WinRT/loopwave_VS2012_WinRT.vcxproj
index 852dbd32a..bb27ceb52 100644
--- a/VisualC/tests/loopwave/WinRT/loopwave_VS2012_WinRT.vcxproj
+++ b/VisualC/tests/loopwave/WinRT/loopwave_VS2012_WinRT.vcxproj
@@ -105,7 +105,7 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)'=='Release'">
     <ClCompile>
-      <PreprocessorDefinitions>NDEBUG;__WINRT__;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|ARM'">NotUsing</PrecompiledHeader>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">NotUsing</PrecompiledHeader>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|x64'">NotUsing</PrecompiledHeader>
@@ -113,7 +113,7 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)'=='Debug'">
     <ClCompile>
-      <PreprocessorDefinitions>_DEBUG;__WINRT__;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">NotUsing</PrecompiledHeader>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">NotUsing</PrecompiledHeader>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">NotUsing</PrecompiledHeader>
diff --git a/include/SDL_platform.h b/include/SDL_platform.h
index 569215c6d..2b2192ca8 100644
--- a/include/SDL_platform.h
+++ b/include/SDL_platform.h
@@ -114,12 +114,44 @@
 #undef __SOLARIS__
 #define __SOLARIS__	1
 #endif
+
 #if defined(WIN32) || defined(_WIN32)
-#if ! defined(__WINRT__)
+/* Try to find out what version of Windows we are compiling for */
+#if defined(_MSC_VER) && (_MSC_VER >= 1700)	/* _MSC_VER==1700 for MSVC 2012 */
+#include <winapifamily.h>
+#endif
+/* Default to classic, Win32 / Desktop compilation if the version of Windows
+   cannot be determined via winapifamily.h. */
+#if ! defined(WINAPI_FAMILY_PARTITION)
+#undef __WIN32__
+#define __WIN32__ 1
+#else
+/* Include Win32 / Desktop App APIs in SDL, if available: */
+#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
+#undef __WIN32__
+#define __WIN32__ 1
+#endif
+/* Include WinRT / Windows Store APIs in SDL, if available: */
+#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
+#undef __WINRT__
+#define __WINRT__ 1
+#endif
+#endif
+#endif
+
+/*
+#if ! defined(WINAPI_FAMILY_PARTITION) || ! WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
 #undef __WIN32__
 #define __WIN32__	1
+#error win32_defined
 #endif
 #endif
+#if defined(WINAPI_FAMILY_PARTITION) && WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
+#undef __WINRT__
+#define __WINRT__	1
+#error winrt_defined
+#endif
+*/
 
 #if defined(__NDS__)
 #undef __NINTENDODS__