diff --git a/packages/editor/src/components/post-preview-button/index.js b/packages/editor/src/components/post-preview-button/index.js
index 5c31e9e271de8..b735ebcd5324e 100644
--- a/packages/editor/src/components/post-preview-button/index.js
+++ b/packages/editor/src/components/post-preview-button/index.js
@@ -80,6 +80,7 @@ function writeInterstitialMessage( targetDocument ) {
 	`;
 
 	targetDocument.write( markup );
+	targetDocument.title = __( 'Generating preview…' );
 	targetDocument.close();
 }