diff --git a/config/zsh/completion.zsh b/config/zsh/completion.zsh
index 59047e4..a289024 100644
--- a/config/zsh/completion.zsh
+++ b/config/zsh/completion.zsh
@@ -1,3 +1,7 @@
+# Enable additional completions from packages in `/usr/local`.
+[ -d "/usr/local/share/zsh/vendor-completions" ] \
+  && fpath=("/usr/local/share/zsh/vendor-completions" $fpath)
+
 zmodload zsh/complist
 autoload -Uz compinit
 compinit -d "$XDG_CACHE_HOME/zsh/.zcompdump"