diff --git a/src/attributes.js b/src/attributes.js
index f1d2944e..ac94081c 100644
--- a/src/attributes.js
+++ b/src/attributes.js
@@ -481,7 +481,7 @@ boolHook = {
 			propName = jQuery.propFix[ name ] || name;
 			if ( propName in elem ) {
 				// Only set the IDL specifically if it already exists on the element
-				elem[ propName ] = value;
+				elem[ propName ] = true;
 			}
 
 			elem.setAttribute( name, name.toLowerCase() );
diff --git a/test/unit/attributes.js b/test/unit/attributes.js
index efeb46e4..79730026 100644
--- a/test/unit/attributes.js
+++ b/test/unit/attributes.js
@@ -150,7 +150,7 @@ test("attr(Hash)", function() {
 });
 
 test("attr(String, Object)", function() {
-	expect(66);
+	expect(69);
 
 	var div = jQuery("div").attr("foo", "bar"),
 		fail = false;
@@ -199,6 +199,11 @@ test("attr(String, Object)", function() {
 	equals( jQuery("#check2").prop("checked"), false, "Set checked attribute" );
 	equals( jQuery("#check2").attr("checked"), undefined, "Set checked attribute" );
 
+	jQuery("#check2").attr("checked", "checked");
+	equal( document.getElementById("check2").checked, true, "Set checked attribute with 'checked'" );
+	equal( jQuery("#check2").prop("checked"), true, "Set checked attribute" );
+	equal( jQuery("#check2").attr("checked"), "checked", "Set checked attribute" );
+
 	jQuery("#text1").prop("readOnly", true);
 	equals( document.getElementById("text1").readOnly, true, "Set readonly attribute" );
 	equals( jQuery("#text1").prop("readOnly"), true, "Set readonly attribute" );