diff --git a/Mac/Modules/MacOS.c b/Mac/Modules/MacOS.c
index 07a3434..272fe8d 100644
--- a/Mac/Modules/MacOS.c
+++ b/Mac/Modules/MacOS.c
@@ -30,7 +30,7 @@
 #include <Carbon/Carbon.h>
 #include <ApplicationServices/ApplicationServices.h>
 
-#ifndef HAVE_MACOS105_SDK
+#ifndef HAVE_OSX105_SDK
 typedef SInt16	FSIORefNum;
 #endif
 
diff --git a/Mac/Modules/file/_Filemodule.c b/Mac/Modules/file/_Filemodule.c
index a314e5b..22e12ec 100644
--- a/Mac/Modules/file/_Filemodule.c
+++ b/Mac/Modules/file/_Filemodule.c
@@ -7,7 +7,7 @@
 
 #include "pymactoolbox.h"
 
-#ifndef HAVE_MACOS105_SDK
+#ifndef HAVE_OSX105_SDK
 typedef SInt16	FSIORefNum;
 #endif