diff --git a/src/wp-admin/css/customize-controls.css b/src/wp-admin/css/customize-controls.css
index d361766539..4462b85162 100644
--- a/src/wp-admin/css/customize-controls.css
+++ b/src/wp-admin/css/customize-controls.css
@@ -1308,7 +1308,7 @@ body.cheatin p {
 	}
 
 	.customize-controls-preview-toggle .controls:before {
-		content: "\f100";
+		content: "\f540";
 	}
 
 	.preview-only #customize-controls {