diff --git a/Build.md b/Build.md
index 3580109..832f7cc 100644
--- a/Build.md
+++ b/Build.md
@@ -86,12 +86,14 @@ For 2, one possible way is use MSYS2, in MSYS2 MinGW 64-bit shell:
 pacman -S mingw-w64-x86_64-clang mingw-w64-x86_64-jq mingw-w64-x86_64-ninja mingw-w64-x86_64-ncurses
 mkdir build
 cd build
-cmake .. -G Ninja  -DSYSTEM_CLANG=ON
+cmake .. -G Ninja  -DSYSTEM_CLANG=ON -DCMAKE_CXX_FLAGS=-D__STDC_FORMAT_MACROS
 cmake --build  .
 ```
 
 Building ccls with MSVC 2017 and locally built LLVM+Clang on Windows does not work right now, contributions welcome.
 
+`-D__STDC_FORMAT_MACROS` is because otherwise `mingw-w64-headers/crt/inttypes.h` does not define `PRIu64`.
+
 ## Link against clang+llvm libraries compiled from source
 
 * `include/llvm/Config/config.h`
diff --git a/Getting-started.md b/Getting-started.md
index 4fa8bf6..fe558a2 100644
--- a/Getting-started.md
+++ b/Getting-started.md
@@ -35,7 +35,7 @@ But caution is that you need to identify whether the clang library is compiled w
 * Mac OS X
   + Homebrew: https://github.com/twlz0ne/homebrew-ccls
   + MacPorts: `cmake -H. -BRelease -DSYSTEM_CLANG=on -DCMAKE_CXX_COMPILER=clang++-mp-6.0 -DCMAKE_PREFIX_PATH=/opt/local/libexec/llvm-6.0 -DLLVM_ENABLE_RTTI=on -DUSE_SHARED_LLVM=on`
-* Windows. It is possible to compile with msys2 or build your own toolchain. But welcome to contribute detailed instructions https://github.com/MaskRay/ccls/issues/59
+* Windows. [[Build#windows]]
 
 Debian: `apt install zlib1g-dev ncurses-dev`