diff --git a/common.props b/common.props
index 2b714f7..94c9744 100644
--- a/common.props
+++ b/common.props
@@ -19,7 +19,7 @@
       <PreprocessorDefinitions>_MBCS;%(PreprocessorDefinitions);NOMINMAX</PreprocessorDefinitions>
     </ClCompile>
     <Link>
-      <AdditionalLibraryDirectories>$(SolutionDir)../cybozulib_ext/mpir/lib;$(SolutionDir)lib</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>$(SolutionDir)../cybozulib_ext/lib;$(SolutionDir)lib</AdditionalLibraryDirectories>
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup />
diff --git a/debug.props b/debug.props
index d261c8d..1553ae0 100644
--- a/debug.props
+++ b/debug.props
@@ -7,7 +7,7 @@
   </PropertyGroup>
   <ItemDefinitionGroup>
     <ClCompile>
-      <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
     </ClCompile>
   </ItemDefinitionGroup>
   <ItemGroup />
diff --git a/include/mcl/gmp_util.hpp b/include/mcl/gmp_util.hpp
index 55d200b..67cbc9e 100644
--- a/include/mcl/gmp_util.hpp
+++ b/include/mcl/gmp_util.hpp
@@ -24,33 +24,7 @@
 #include <stdint.h>
 #ifdef _MSC_VER
 	#pragma warning(pop)
-#endif
-#ifdef _MSC_VER
-#if _MSC_VER == 1900 /* VS2015 */
-#ifdef _DEBUG
-#pragma comment(lib, "14/mpird.lib")
-#pragma comment(lib, "14/mpirxxd.lib")
-#else
-#pragma comment(lib, "14/mpir.lib")
-#pragma comment(lib, "14/mpirxx.lib")
-#endif
-#elif _MSC_VER == 1800 /* VS2013 */
-#ifdef _DEBUG
-#pragma comment(lib, "12/mpird.lib")
-#pragma comment(lib, "12/mpirxxd.lib")
-#else
-#pragma comment(lib, "12/mpir.lib")
-#pragma comment(lib, "12/mpirxx.lib")
-#endif
-#else /* assume _MSC_VER == 1700 . VS2012 */
-#ifdef _DEBUG
-#pragma comment(lib, "mpird.lib")
-#pragma comment(lib, "mpirxxd.lib")
-#else
-#pragma comment(lib, "mpir.lib")
-#pragma comment(lib, "mpirxx.lib")
-#endif
-#endif
+	#include <cybozu/link_mpir.hpp>
 #endif
 
 namespace mcl {
diff --git a/readme.md b/readme.md
index ab746a2..3f597f1 100644
--- a/readme.md
+++ b/readme.md
@@ -37,6 +37,12 @@ cd mcl
 make BIT=32 CFLAGS_USER="-I <lib32>/include" LDFLAGS_USER="-L <lib32>/lib -Wl,-rpath,<lib32>/lib"
 ```
 
+## Build for 64-bit Windows
+open mcl.sln and build or if you have msbuild.exe
+```
+msbuild /p:Configuration=Release
+```
+
 # License
 
 modified new BSD License
diff --git a/release.props b/release.props
index 88b0830..886ce68 100644
--- a/release.props
+++ b/release.props
@@ -5,7 +5,7 @@
   <PropertyGroup />
   <ItemDefinitionGroup>
     <ClCompile>
-      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
     </ClCompile>
   </ItemDefinitionGroup>
   <ItemGroup />