diff --git a/layout/generic/nsObjectFrame.cpp b/layout/generic/nsObjectFrame.cpp
index 758436c8b6b..711843fc342 100644
--- a/layout/generic/nsObjectFrame.cpp
+++ b/layout/generic/nsObjectFrame.cpp
@@ -325,6 +325,7 @@ nsObjectFrame::Destroy(nsIPresContext* aPresContext)
     {
       inst->SetWindow(nsnull);
       inst->Stop();
+      NS_RELEASE(inst);
     }
   }
   return nsObjectFrameSuper::Destroy(aPresContext);
diff --git a/layout/html/base/src/nsObjectFrame.cpp b/layout/html/base/src/nsObjectFrame.cpp
index 758436c8b6b..711843fc342 100644
--- a/layout/html/base/src/nsObjectFrame.cpp
+++ b/layout/html/base/src/nsObjectFrame.cpp
@@ -325,6 +325,7 @@ nsObjectFrame::Destroy(nsIPresContext* aPresContext)
     {
       inst->SetWindow(nsnull);
       inst->Stop();
+      NS_RELEASE(inst);
     }
   }
   return nsObjectFrameSuper::Destroy(aPresContext);