--- src/chemeq.l.orig	Fri Oct 26 14:02:19 2001
+++ src/chemeq.l	Fri Oct 26 14:02:26 2001
@@ -2,6 +2,7 @@
 %option c++
      
    #include <stdlib.h>
+   #include <errno.h>
    #include "chemeq.h"
 
    char * ind;