diff --git a/src/core.js b/src/core.js
index a35e79893..265f0bc4a 100644
--- a/src/core.js
+++ b/src/core.js
@@ -179,11 +179,6 @@ jQuery.fn = jQuery.prototype = {
 	// The default length of a jQuery object is 0
 	length: 0,
 
-	// The number of elements contained in the matched element set
-	size: function() {
-		return this.length;
-	},
-
 	toArray: function() {
 		return core_slice.call( this );
 	},
diff --git a/src/deprecated.js b/src/deprecated.js
index 722edb006..40f8dd6cd 100644
--- a/src/deprecated.js
+++ b/src/deprecated.js
@@ -1,6 +1,11 @@
 // Limit scope pollution from any deprecated API
 // (function() {
 
+// The number of elements contained in the matched element set
+jQuery.fn.size = function() {
+	return this.length;
+};
+
 jQuery.fn.andSelf = jQuery.fn.addBack;
 
 // })();