diff -Naur daemontools-0.76.orig/src/error.h daemontools-0.76/src/error.h
--- daemontools-0.76.orig/src/error.h	2001-07-12 18:49:49.000000000 +0200
+++ daemontools-0.76/src/error.h	2004-01-25 14:14:48.000000000 +0100
@@ -3,7 +3,7 @@
 #ifndef ERROR_H
 #define ERROR_H
 
-extern int errno;
+#include <errno.h>
 
 extern int error_intr;
 extern int error_nomem;