diff -up m4-1.4.14/src/m4.h_old m4-1.4.14/src/m4.h
--- m4-1.4.14/src/m4.h_old	2010-03-01 15:43:40.376976016 +0100
+++ m4-1.4.14/src/m4.h	2010-03-01 15:44:00.265984491 +0100
@@ -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"