diff --git a/docs/getting-started/customizing.md b/docs/getting-started/customizing.md
index 59737705..ab42c945 100644
--- a/docs/getting-started/customizing.md
+++ b/docs/getting-started/customizing.md
@@ -58,7 +58,7 @@ Here's an example that modifies buttons with the `tomato-button` class.
     background: rgba(255, 99, 71, .2);
   }    
 
-  .tomato-button::part(base):focus {
+  .tomato-button::part(base):focus-visible {
     box-shadow: 0 0 0 3px rgba(255, 99, 71, .33);
   }