diff --git a/mozilla/layout/html/base/src/nsHTMLImage.cpp b/mozilla/layout/html/base/src/nsHTMLImage.cpp
index 532ace0a65d..5d7dff621ea 100644
--- a/mozilla/layout/html/base/src/nsHTMLImage.cpp
+++ b/mozilla/layout/html/base/src/nsHTMLImage.cpp
@@ -540,6 +540,7 @@ ImageFrame::DisplayAltText(nsIPresContext&      aPresContext,
     y += height;
   }
 
+  NS_RELEASE(fm);
   aRenderingContext.PopState();
 }