diff --git a/mozilla/layout/html/base/src/nsHTMLContainer.cpp b/mozilla/layout/html/base/src/nsHTMLContainer.cpp
index f72d8937fac..a5f5421941a 100644
--- a/mozilla/layout/html/base/src/nsHTMLContainer.cpp
+++ b/mozilla/layout/html/base/src/nsHTMLContainer.cpp
@@ -811,6 +811,7 @@ void nsHTMLContainer::MapAttributesInto(nsIStyleContext* aContext,
             styleSheet->SetVisitedLinkColor(value.GetColorValue());
           }
         }
+        NS_RELEASE(htmlDoc);
       }
 
       // set up the basefont (defaults to 3)