diff --git a/layout/mathml/base/src/nsIMathMLFrame.h b/layout/mathml/base/src/nsIMathMLFrame.h
index 5998ba0c1a80..d620add46924 100644
--- a/layout/mathml/base/src/nsIMathMLFrame.h
+++ b/layout/mathml/base/src/nsIMathMLFrame.h
@@ -24,6 +24,7 @@
 
 struct nsPresentationData;
 struct nsEmbellishData;
+struct nsHTMLReflowMetrics;
 
 // IID for the nsIMathMLFrame interface (the IID was taken from IIDS.h) 
 /* a6cf9113-15b3-11d2-932e-00805f8add32 */
diff --git a/layout/mathml/base/src/nsMathMLmactionFrame.cpp b/layout/mathml/base/src/nsMathMLmactionFrame.cpp
index 4583848ff80d..e069bf51187e 100644
--- a/layout/mathml/base/src/nsMathMLmactionFrame.cpp
+++ b/layout/mathml/base/src/nsMathMLmactionFrame.cpp
@@ -492,7 +492,7 @@ nsMathMLmactionFrame::MouseClick(nsIDOMEvent* aMouseEvent)
         mPresContext->GetShell(getter_AddRefs(presShell));
         presShell->CancelReflowCommand(this, nsnull);
         nsFrame::CreateAndPostReflowCommand(presShell, mSelectedFrame, 
-          nsIReflowCommand::StyleChanged, nsnull, nsnull, nsnull);
+          eReflowType_StyleChanged, nsnull, nsnull, nsnull);
       }
     }
   }