diff --git a/mozilla/layout/base/nsCSSFrameConstructor.cpp b/mozilla/layout/base/nsCSSFrameConstructor.cpp
index 0eaf2f851fb..74422445327 100644
--- a/mozilla/layout/base/nsCSSFrameConstructor.cpp
+++ b/mozilla/layout/base/nsCSSFrameConstructor.cpp
@@ -7112,7 +7112,6 @@ nsCSSFrameConstructor::CantRenderReplacedElement(nsIPresContext* aPresContext,
   nsIFrame*     firstChild;
   parentFrame->FirstChild(listName, &firstChild);
   nsFrameList   frameList(firstChild);
-  nsIFrame*     prevSibling = frameList.GetPrevSiblingFor(aFrame);
   
   // See whether it's an IMG or an OBJECT element
   if (nsHTMLAtoms::img == tag.get()) {
diff --git a/mozilla/layout/html/style/src/nsCSSFrameConstructor.cpp b/mozilla/layout/html/style/src/nsCSSFrameConstructor.cpp
index 0eaf2f851fb..74422445327 100644
--- a/mozilla/layout/html/style/src/nsCSSFrameConstructor.cpp
+++ b/mozilla/layout/html/style/src/nsCSSFrameConstructor.cpp
@@ -7112,7 +7112,6 @@ nsCSSFrameConstructor::CantRenderReplacedElement(nsIPresContext* aPresContext,
   nsIFrame*     firstChild;
   parentFrame->FirstChild(listName, &firstChild);
   nsFrameList   frameList(firstChild);
-  nsIFrame*     prevSibling = frameList.GetPrevSiblingFor(aFrame);
   
   // See whether it's an IMG or an OBJECT element
   if (nsHTMLAtoms::img == tag.get()) {