diff -Nurd -x'*~' y.orig/y.c y/y.c
--- y.orig/y.c	2003-07-06 17:16:54.000000000 -0400
+++ y/y.c	2003-07-07 17:43:56.000000000 -0400
@@ -7,6 +7,7 @@
 #include <stdlib.h>
 #include <sys/stat.h>
 #include <sys/errno.h>
+#include <string.h>
 
 #define TEMPMASK "/tmp/y.XXXXXX"	/* the name of our tempfile */