diff -ur defrag-0.73/misc.c defrag-0.73.glibc/misc.c
--- defrag-0.73/misc.c	Sun Aug 17 16:02:33 1997
+++ defrag-0.73.glibc/misc.c	Wed Jan 28 00:05:05 1998
@@ -10,6 +10,7 @@
  */
 
 #include <stdlib.h>
+#include <errno.h>
 #include <stdio.h>
 #include <unistd.h>
 #include <mntent.h>