diff --git a/gfx/src/mac/nsWatchTask.h b/gfx/src/mac/nsWatchTask.h
index f14d83e32fe4..4877c0986596 100644
--- a/gfx/src/mac/nsWatchTask.h
+++ b/gfx/src/mac/nsWatchTask.h
@@ -45,7 +45,7 @@
 #include <Retrace.h>
 #endif
 #include <Quickdraw.h>
-#include "PRTypes.h"
+#include "prtypes.h"
 #include "nscore.h"
 
 
diff --git a/widget/src/mac/nsAppShell.cpp b/widget/src/mac/nsAppShell.cpp
index 2b99b6e9f15c..4ba9b11c4b69 100644
--- a/widget/src/mac/nsAppShell.cpp
+++ b/widget/src/mac/nsAppShell.cpp
@@ -51,7 +51,7 @@
 #include "nsIServiceManager.h"
 #include "nsIWidget.h"
 #include "nsMacMessagePump.h"
-#include "nsToolKit.h"
+#include "nsToolkit.h"
 #include <Quickdraw.h>
 #include <Fonts.h>
 #include <TextEdit.h>
diff --git a/widget/src/mac/nsMenuX.cpp b/widget/src/mac/nsMenuX.cpp
index 1a60c744ebba..6108ac5e3295 100644
--- a/widget/src/mac/nsMenuX.cpp
+++ b/widget/src/mac/nsMenuX.cpp
@@ -46,7 +46,7 @@
 #include "prinrval.h"
 
 #include "nsMenuX.h"
-#include "nsMenubarX.h"
+#include "nsMenuBarX.h"
 #include "nsIMenu.h"
 #include "nsIMenuBar.h"
 #include "nsIMenuItem.h"