diff --git a/layout/generic/nsHTMLContainerFrame.cpp b/layout/generic/nsHTMLContainerFrame.cpp
index 9aa92074d2e4..bfb5247fa375 100644
--- a/layout/generic/nsHTMLContainerFrame.cpp
+++ b/layout/generic/nsHTMLContainerFrame.cpp
@@ -106,6 +106,7 @@ nsHTMLContainerFrame::CreatePlaceholderFrame(nsIPresContext& aPresContext,
   return placeholder;
 }
 
+#if 0
 // XXX pass in aFrame's style context instead
 PRBool
 nsHTMLContainerFrame::MoveFrameOutOfFlow(nsIPresContext&        aPresContext,
@@ -140,6 +141,7 @@ nsHTMLContainerFrame::MoveFrameOutOfFlow(nsIPresContext&        aPresContext,
 
   return PR_FALSE;
 }
+#endif
 
 /**
  * Create a next-in-flow for aFrame. Will return the newly created
diff --git a/layout/generic/nsHTMLContainerFrame.h b/layout/generic/nsHTMLContainerFrame.h
index 644b24443c08..64eeb9d090b7 100644
--- a/layout/generic/nsHTMLContainerFrame.h
+++ b/layout/generic/nsHTMLContainerFrame.h
@@ -45,11 +45,13 @@ public:
   // sibling pointers.
   // XXX bad api - need nsresult in case we attempt to move out of the
   // flow and run out of memory
+#if 0
   PRBool MoveFrameOutOfFlow(nsIPresContext&        aPresContext,
                             nsIFrame*              aFrame,
                             const nsStyleDisplay*  aDisplay,
                             const nsStylePosition* aPosition,
                             nsIFrame*&             aPlaceholderFrame);
+#endif
 
   /**
    * Helper method to create next-in-flows if necessary. If aFrame
diff --git a/layout/html/base/src/nsHTMLContainerFrame.cpp b/layout/html/base/src/nsHTMLContainerFrame.cpp
index 9aa92074d2e4..bfb5247fa375 100644
--- a/layout/html/base/src/nsHTMLContainerFrame.cpp
+++ b/layout/html/base/src/nsHTMLContainerFrame.cpp
@@ -106,6 +106,7 @@ nsHTMLContainerFrame::CreatePlaceholderFrame(nsIPresContext& aPresContext,
   return placeholder;
 }
 
+#if 0
 // XXX pass in aFrame's style context instead
 PRBool
 nsHTMLContainerFrame::MoveFrameOutOfFlow(nsIPresContext&        aPresContext,
@@ -140,6 +141,7 @@ nsHTMLContainerFrame::MoveFrameOutOfFlow(nsIPresContext&        aPresContext,
 
   return PR_FALSE;
 }
+#endif
 
 /**
  * Create a next-in-flow for aFrame. Will return the newly created
diff --git a/layout/html/base/src/nsHTMLContainerFrame.h b/layout/html/base/src/nsHTMLContainerFrame.h
index 644b24443c08..64eeb9d090b7 100644
--- a/layout/html/base/src/nsHTMLContainerFrame.h
+++ b/layout/html/base/src/nsHTMLContainerFrame.h
@@ -45,11 +45,13 @@ public:
   // sibling pointers.
   // XXX bad api - need nsresult in case we attempt to move out of the
   // flow and run out of memory
+#if 0
   PRBool MoveFrameOutOfFlow(nsIPresContext&        aPresContext,
                             nsIFrame*              aFrame,
                             const nsStyleDisplay*  aDisplay,
                             const nsStylePosition* aPosition,
                             nsIFrame*&             aPlaceholderFrame);
+#endif
 
   /**
    * Helper method to create next-in-flows if necessary. If aFrame