diff --git a/mozilla/chrome/src/nsChromeRegistry.cpp b/mozilla/chrome/src/nsChromeRegistry.cpp
index 226fad9fa1e..f576d39ca4e 100644
--- a/mozilla/chrome/src/nsChromeRegistry.cpp
+++ b/mozilla/chrome/src/nsChromeRegistry.cpp
@@ -340,6 +340,7 @@ nsChromeRegistry::OverlayListHash::GetArray(nsIURI* aBase)
 
 nsChromeRegistry::~nsChromeRegistry()
 {
+  PL_DHashTableFinish(&mPackagesHash);
   gChromeRegistry = nsnull;
 }