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-rw-r--r--doc/windows.md4
1 files changed, 2 insertions, 2 deletions
diff --git a/doc/windows.md b/doc/windows.md
index 8159b25861..4df732bd84 100644
--- a/doc/windows.md
+++ b/doc/windows.md
@@ -19,7 +19,7 @@ Ruby core development can be done either in Windows `cmd` like:
```
ridk enable ucrt64
-pacman -S --needed %MINGW_PACKAGE_PREFIX%-openssl %MINGW_PACKAGE_PREFIX%-libyaml
+pacman -S --needed %MINGW_PACKAGE_PREFIX%-openssl %MINGW_PACKAGE_PREFIX%-libyaml %MINGW_PACKAGE_PREFIX%-libffi
cd c:\
mkdir work
@@ -38,7 +38,7 @@ or in MSYS2 `bash` like:
ridk enable ucrt64
bash
-pacman -S --needed $MINGW_PACKAGE_PREFIX-openssl $MINGW_PACKAGE_PREFIX-libyaml
+pacman -S --needed $MINGW_PACKAGE_PREFIX-openssl $MINGW_PACKAGE_PREFIX-libyaml $MINGW_PACKAGE_PREFIX-libffi
cd /c/
mkdir work