diff --git a/INSTALL.md b/INSTALL.md
index 15f96cc..39bd0ea 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -29,8 +29,8 @@
 Using [Homebrew](http://brew.sh):
 ```
 brew install openal-soft freealut libconfig
-brew install https://raw.githubusercontent.com/Tox/homebrew-tox/master/Formula/libtoxcore.rb
-brew install https://raw.githubusercontent.com/Homebrew/homebrew-x11/master/libnotify.rb
+brew install --HEAD https://raw.githubusercontent.com/Tox/homebrew-tox/master/Formula/libtoxcore.rb
+brew install libnotify
 ```
 
 You can omit `libnotify` if you intend to build without desktop notifications enabled.
diff --git a/src/qr_code.c b/src/qr_code.c
index 83ea5ac..bd212a5 100644
--- a/src/qr_code.c
+++ b/src/qr_code.c
@@ -23,6 +23,7 @@
 #include <stdlib.h>
 #include <qrencode.h>
 #include <stdbool.h>
+#include <string.h>
 
 #include "toxic.h"
 #include "windows.h"