diff --git a/src/wp-includes/js/customize-preview.js b/src/wp-includes/js/customize-preview.js
index d95f804bcd..7b8804d3ed 100644
--- a/src/wp-includes/js/customize-preview.js
+++ b/src/wp-includes/js/customize-preview.js
@@ -273,7 +273,7 @@
 	 * @returns {boolean} Is appropriate for changeset link.
 	 */
 	api.isLinkPreviewable = function isLinkPreviewable( element, options ) {
-		var matchesAllowedUrl, parsedAllowedUrl, args;
+		var matchesAllowedUrl, parsedAllowedUrl, args, elementHost;
 
 		args = _.extend( {}, { allowAdminAjax: false }, options || {} );
 
@@ -286,10 +286,11 @@
 			return false;
 		}
 
+		elementHost = element.host.replace( /:80$/, '' );
 		parsedAllowedUrl = document.createElement( 'a' );
 		matchesAllowedUrl = ! _.isUndefined( _.find( api.settings.url.allowed, function( allowedUrl ) {
 			parsedAllowedUrl.href = allowedUrl;
-			return parsedAllowedUrl.protocol === element.protocol && parsedAllowedUrl.host === element.host && 0 === element.pathname.indexOf( parsedAllowedUrl.pathname.replace( /\/$/, '' ) );
+			return parsedAllowedUrl.protocol === element.protocol && parsedAllowedUrl.host.replace( /:80$/, '' ) === elementHost && 0 === element.pathname.indexOf( parsedAllowedUrl.pathname.replace( /\/$/, '' ) );
 		} ) );
 		if ( ! matchesAllowedUrl ) {
 			return false;