diff --git a/README.md b/README.md
index aab6a30..b7a6e06 100644
--- a/README.md
+++ b/README.md
@@ -35,12 +35,13 @@ Add `antigen bundle zsh-users/zsh-completions` to your `~/.zshrc`.
 
 * Clone the repository inside your oh-my-zsh repo:
 
-        git clone https://github.com/zsh-users/zsh-completions ${ZSH_CUSTOM:=~/.oh-my-zsh/custom}/plugins/zsh-completions
+        git clone https://github.com/zsh-users/zsh-completions ${ZSH_CUSTOM:-${ZSH:-~/.oh-my-zsh}/custom}/plugins/zsh-completions
 
-* Enable it in your `.zshrc` by adding it to your plugin list and reloading the completion:
+* Add it to `FPATH` in your `.zshrc` by adding the following line before `source "$ZSH/oh-my-zsh.sh"`:
 
-        plugins=(… zsh-completions)
-        autoload -U compinit && compinit
+        fpath+=${ZSH_CUSTOM:-${ZSH:-~/.oh-my-zsh}/custom}/plugins/zsh-completions/src
+
+Note: adding it as a regular Oh My ZSH! plugin will not work properly (see [#603](https://github.com/zsh-users/zsh-completions/issues/603)).
 
 ### Manual installation