diff --git a/src/manipulation.js b/src/manipulation.js
index a148658f..c76aa9e0 100644
--- a/src/manipulation.js
+++ b/src/manipulation.js
@@ -582,6 +582,8 @@ jQuery.extend({
 			}
 		}
 
+		srcElements = destElements = null;
+
 		// Return the cloned set
 		return clone;
 	},