1 files changed, 1 insertions, 2 deletions
diff --git a/layout/mathml/nsMathMLmoFrame.cpp b/layout/mathml/nsMathMLmoFrame.cpp
index 591b46309a..3ef7b88d00 100644
--- a/layout/mathml/nsMathMLmoFrame.cpp
+++ b/layout/mathml/nsMathMLmoFrame.cpp
@@ -78,14 +78,13 @@ nsMathMLmoFrame::UseMathMLChar()
 
 void
 nsMathMLmoFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
-                                  const nsRect&           aDirtyRect,
                                   const nsDisplayListSet& aLists)
 {
   bool useMathMLChar = UseMathMLChar();
 
   if (!useMathMLChar) {
     // let the base class do everything
-    nsMathMLTokenFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists);
+    nsMathMLTokenFrame::BuildDisplayList(aBuilder, aLists);
   } else {
     DisplayBorderBackgroundOutline(aBuilder, aLists);