diff --git a/docs/walkthroughs/applying-custom-formatting.md b/docs/walkthroughs/applying-custom-formatting.md
index cd4d0d3cf..4b4b22ce2 100644
--- a/docs/walkthroughs/applying-custom-formatting.md
+++ b/docs/walkthroughs/applying-custom-formatting.md
@@ -146,11 +146,13 @@ class App extends React.Component {
       case 'b': {
         event.preventDefault()
         editor.toggleMark('bold')
+        break
       }
       case '`': {
         const isCode = editor.value.blocks.some(block => block.type == 'code')
         event.preventDefault()
         editor.setBlocks(isCode ? 'paragraph' : 'code')
+        break
       }
       default: {
         return next()