diff --git a/include/Mw/MachDep.h b/include/Mw/MachDep.h
index dbb4134..a9552ab 100644
--- a/include/Mw/MachDep.h
+++ b/include/Mw/MachDep.h
@@ -18,6 +18,7 @@
 #include <sys/ipc.h>
 #include <sys/shm.h>
 #include <dlfcn.h>
+#include <signal.h>
 #endif
 
 #if defined(_MILSKO) && defined(_WIN32)
diff --git a/src/backend/mac/mac.c b/src/backend/mac/mac.c
index b9a1d89..512ee37 100644
--- a/src/backend/mac/mac.c
+++ b/src/backend/mac/mac.c
@@ -1,8 +1,8 @@
-#include "Mw/LowLevel.h"
+/* $Id$ */
+#include <Mw/Milsko.h>
 
 #include "mac.h"
 #include "quickDraw.h"
-#include <signal.h>
 
 MwLL MwLLCreate(MwLL parent, int x, int y, int width, int height) {
 	void* library;
diff --git a/src/backend/mac/mac.h b/src/backend/mac/mac.h
index 975f6ee..6755243 100644
--- a/src/backend/mac/mac.h
+++ b/src/backend/mac/mac.h
@@ -1,8 +1,10 @@
-/* $Id $ */
+/* $Id$ */
 
 #ifndef __MAC_H__
 #define __MAC_H__
 
+#include <Mw/MachDep.h>
+#include <Mw/TypeDefs.h>
 #include <Mw/LowLevel.h>
 
 typedef enum {
diff --git a/src/backend/mac/preQuartz.h b/src/backend/mac/preQuartz.h
index 7e42fda..6c9ee34 100644
--- a/src/backend/mac/preQuartz.h
+++ b/src/backend/mac/preQuartz.h
@@ -1,4 +1,4 @@
-/* $Id $ */
+/* $Id$ */
 
 // This is a copy of a bunch of headers from Apple's old SDK with irrelvant things removed.
 // The reason this exists is for compiling under modern XCode (which doesn't have these headers).
diff --git a/src/backend/mac/quickDraw.c b/src/backend/mac/quickDraw.c
index c03c3e1..190ab2c 100644
--- a/src/backend/mac/quickDraw.c
+++ b/src/backend/mac/quickDraw.c
@@ -1,4 +1,4 @@
-/* $Id $ */
+/* $Id$ */
 
 #include "mac.h"
 #include "quickDraw.h"