diff --git a/ui/jquery.ui.accordion.js b/ui/jquery.ui.accordion.js
index bce78231b..0ac478b73 100644
--- a/ui/jquery.ui.accordion.js
+++ b/ui/jquery.ui.accordion.js
@@ -140,9 +140,9 @@ $.widget("ui.accordion", {
 		this.headers
 			.unbind(".accordion")
 			.removeClass("ui-accordion-header ui-helper-reset ui-state-default ui-corner-all ui-state-active ui-corner-top")
-			.removeAttr("role").removeAttr("aria-expanded").removeAttr("tabindex");
+			.removeAttr("role").removeAttr("aria-expanded").removeAttr("tabIndex");
 
-		this.headers.find("a").removeAttr("tabindex");
+		this.headers.find("a").removeAttr("tabIndex");
 		this._destroyIcons();
 		var contents = this.headers.next().css("display", "").removeAttr("role").removeClass("ui-helper-reset ui-widget-content ui-corner-bottom ui-accordion-content ui-accordion-content-active");
 		if (o.autoHeight || o.fillHeight) {