diff --git a/src/core.js b/src/core.js
index d059564f..1236f1c6 100644
--- a/src/core.js
+++ b/src/core.js
@@ -282,7 +282,7 @@ jQuery.fn = jQuery.prototype = {
 			this.get(),
 			t.constructor == String ?
 				jQuery(t).get() :
-				t.length != undefined && (!t.nodeName || t.nodeName == "FORM") ?
+				t.length != undefined && (!t.nodeName || jQuery.nodeName(t, "form")) ?
 					t : [t] )
 		);
 	},