diff --git a/README.osx b/README.osx
index 3afcd9074578..c2ca0a59afce 100644
--- a/README.osx
+++ b/README.osx
@@ -9,7 +9,7 @@ homebrew.
 
 Example usage::
 
-  brew install libpng freetype
+  brew install libpng freetype pkgconfig
 
 If you are using MacPorts, execute the following instead: