diff --git a/mozilla/content/html/content/src/nsHTMLFormElement.cpp b/mozilla/content/html/content/src/nsHTMLFormElement.cpp
index b2c19cef2e8..b1fc302a6d0 100644
--- a/mozilla/content/html/content/src/nsHTMLFormElement.cpp
+++ b/mozilla/content/html/content/src/nsHTMLFormElement.cpp
@@ -347,6 +347,7 @@ protected:
 class nsFormControlEnumerator : public nsISimpleEnumerator {
 public:
   nsFormControlEnumerator(nsHTMLFormElement* aForm);
+  virtual ~nsFormControlEnumerator() { };
 
   NS_DECL_ISUPPORTS
   NS_DECL_NSISIMPLEENUMERATOR