diff --git a/src/core.js b/src/core.js
index c99f27e224d..54b44b1ea69 100644
--- a/src/core.js
+++ b/src/core.js
@@ -289,10 +289,6 @@ jQuery.extend( {
 		return string.replace( rmsPrefix, "ms-" ).replace( rdashAlpha, fcamelCase );
 	},
 
-	nodeName: function( elem, name ) {
-		return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase();
-	},
-
 	each: function( obj, callback ) {
 		var length, i = 0;
 
diff --git a/src/deprecated.js b/src/deprecated.js
index 0329b95640e..bff06b5b90d 100644
--- a/src/deprecated.js
+++ b/src/deprecated.js
@@ -22,6 +22,9 @@ jQuery.fn.extend( {
 		return arguments.length === 1 ?
 			this.off( selector, "**" ) :
 			this.off( types, selector || "**", fn );
+	},
+	nodeName: function( elem, name ) {
+		return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase();
 	}
 } );