diff --git a/ui/widgets/checkboxradio.js b/ui/widgets/checkboxradio.js
index 107749201..300cae8ce 100644
--- a/ui/widgets/checkboxradio.js
+++ b/ui/widgets/checkboxradio.js
@@ -115,7 +115,9 @@ $.widget( "ui.checkboxradio", [ $.ui.formResetMixin, {
 
 		if ( checked ) {
 			this._addClass( this.label, "ui-checkboxradio-checked", "ui-state-active" );
-			this._addClass( this.icon, null, "ui-state-hover" );
+			if ( this.icon ) {
+				this._addClass( this.icon, null, "ui-state-hover" );
+			}
 		}
 
 		this._on( {