diff --git a/plugins/git-extras/README.md b/plugins/git-extras/README.md
index 2adc9d477..7eb53fcfd 100644
--- a/plugins/git-extras/README.md
+++ b/plugins/git-extras/README.md
@@ -1,6 +1,6 @@
 # git-extras
 
-This plugin provides completion definitions for some of the commands defined by [git-extras](https://github.com/tj/git-extras).
+This plugin provides completion definitions for some of the commands defined by [git-extras](https://github.com/tj/git-extras), which must already be installed.
 
 To use it, add `git-extras` to the plugins array in your zshrc file: