diff -Naur a/src/m4.h b/src/m4.h
--- a/src/m4.h	2010-06-16 15:09:25.926731245 +0000
+++ b/src/m4.h	2010-06-16 15:20:05.120422787 +0000
@@ -33,6 +33,7 @@
 #include <stdint.h>
 #include <string.h>
 #include <sys/types.h>
+#include <sys/stat.h>
 
 #include "binary-io.h"
 #include "clean-temp.h"