diff -u ucspi-tcp-0.88.old/error.h ucspi-tcp-0.88/error.h
--- ucspi-tcp-0.88.old/error.h	2000-03-18 09:18:20.000000000 -0600
+++ ucspi-tcp-0.88/error.h	2003-01-08 13:39:12.000000000 -0600
@@ -1,7 +1,7 @@
 #ifndef ERROR_H
 #define ERROR_H
 
-extern int errno;
+#include <errno.h>

 extern int error_intr;
 extern int error_nomem;
