diff --git a/ui/core.js b/ui/core.js
index 6cf599964..1072e89f1 100644
--- a/ui/core.js
+++ b/ui/core.js
@@ -21,7 +21,9 @@
 		define( [
 			"jquery",
 			"./data",
-			"./version" ], factory );
+			"./disable-selection",
+			"./version"
+		], factory );
 	} else {
 
 		// Browser globals
@@ -284,24 +286,6 @@ if ( $.fn.jquery.substring( 0, 3 ) === "1.7" ) {
 // deprecated
 $.ui.ie = !!/msie [\w.]+/.exec( navigator.userAgent.toLowerCase() );
 
-$.fn.extend( {
-	disableSelection: ( function() {
-		var eventType = "onselectstart" in document.createElement( "div" ) ?
-			"selectstart" :
-			"mousedown";
-
-		return function() {
-			return this.on( eventType + ".ui-disableSelection", function( event ) {
-				event.preventDefault();
-			} );
-		};
-	} )(),
-
-	enableSelection: function() {
-		return this.off( ".ui-disableSelection" );
-	}
-} );
-
 // $.ui.plugin is deprecated. Use $.widget() extensions instead.
 $.ui.plugin = {
 	add: function( module, option, set ) {
diff --git a/ui/disable-selection.js b/ui/disable-selection.js
new file mode 100644
index 000000000..aa6df0173
--- /dev/null
+++ b/ui/disable-selection.js
@@ -0,0 +1,46 @@
+/*!
+ * jQuery UI Disable Selection @VERSION
+ * http://jqueryui.com
+ *
+ * Copyright jQuery Foundation and other contributors
+ * Released under the MIT license.
+ * http://jquery.org/license
+ */
+
+//>>label: disableSelection
+//>>group: Core
+//>>description: Disable selection of text content within the set of matched elements.
+//>>docs: http://api.jqueryui.com/disableSelection/
+
+// This file is deprecated
+( function( factory ) {
+	if ( typeof define === "function" && define.amd ) {
+
+		// AMD. Register as an anonymous module.
+		define( [ "jquery", "./version" ], factory );
+	} else {
+
+		// Browser globals
+		factory( jQuery );
+	}
+} ( function( $ ) {
+
+return $.fn.extend( {
+	disableSelection: ( function() {
+		var eventType = "onselectstart" in document.createElement( "div" ) ?
+			"selectstart" :
+			"mousedown";
+
+		return function() {
+			return this.on( eventType + ".ui-disableSelection", function( event ) {
+				event.preventDefault();
+			} );
+		};
+	} )(),
+
+	enableSelection: function() {
+		return this.off( ".ui-disableSelection" );
+	}
+} );
+
+} ) );
diff --git a/ui/resizable.js b/ui/resizable.js
index 6b4fd1013..1c0ad6ff1 100644
--- a/ui/resizable.js
+++ b/ui/resizable.js
@@ -23,8 +23,9 @@
 		define([
 			"jquery",
 			"./core",
-			"./version",
+			"./disable-selection",
 			"./mouse",
+			"./version",
 			"./widget"
 		], factory );
 	} else {