diff --git a/Library/Contributions/brew_zsh_completion.zsh b/Library/Contributions/brew_zsh_completion.zsh
index 89bb02fb8f..ab889d405e 100644
--- a/Library/Contributions/brew_zsh_completion.zsh
+++ b/Library/Contributions/brew_zsh_completion.zsh
@@ -52,6 +52,7 @@ _1st_arguments=(
   'search:search for a formula (/regex/ or string)'
   'server:start a local web app that lets you browse formulae (requires Sinatra)'
   'services:small wrapper around `launchctl` for supported formulae'
+  'switch:switch between different versions of a formula'
   'tap:tap a new formula repository from GitHub, or list existing taps'
   'unlink:unlink a formula'
   'unpin:unpin specified formulae'
@@ -90,7 +91,7 @@ if (( CURRENT == 1 )); then
 fi
 
 case "$words[1]" in
-  install|reinstall|audit|home|homepage|log|info|abv|uses|cat|deps|edit|options)
+  install|reinstall|audit|home|homepage|log|info|abv|uses|cat|deps|edit|options|switch)
     _brew_all_formulae
     _wanted formulae expl 'all formulae' compadd -a formulae ;;
   list|ls)