diff --git a/samples/toolbarconfigurator/js/fulltoolbareditor.js b/samples/toolbarconfigurator/js/fulltoolbareditor.js
index ec61298396b..2b9f15f7590 100644
--- a/samples/toolbarconfigurator/js/fulltoolbareditor.js
+++ b/samples/toolbarconfigurator/js/fulltoolbareditor.js
@@ -324,6 +324,8 @@ window.ToolbarConfigurator = {};
 
 		$button.addClass( 'button-a' );
 
+		$button.setAttribute( 'type', 'button' );
+
 		if ( typeof cssClasses == 'string' ) {
 			cssClasses = cssClasses.split( ' ' );