diff --git a/runcoms/zpreztorc b/runcoms/zpreztorc
index 1b957fd..0921c2a 100644
--- a/runcoms/zpreztorc
+++ b/runcoms/zpreztorc
@@ -163,7 +163,7 @@ zstyle ':prezto:module:prompt' theme 'starship'
 #
 
 # Auto switch the Ruby version on directory change.
-# zstyle ':prezto:module:ruby:chruby' auto-switch 'yes'
+zstyle ':prezto:module:ruby:chruby' auto-switch 'yes'
 
 #
 # Screen