--- ./src/gnuan.c.orig	1999-04-02 19:58:53.000000000 -0800
+++ ./src/gnuan.c	2004-06-26 15:41:52.000000000 -0700
@@ -56,6 +56,8 @@
  * filename and depth are entered at runtime, the output goes to stdout.
  */
 
+#include <errno.h>
+
 #undef BACKGROUND_ANALYSIS
 
 #define MAX_DEPTH  MAXDEPTH
--- ./src/dspcom.c.orig	1998-09-27 23:41:19.000000000 -0700
+++ ./src/dspcom.c	2004-06-26 15:41:08.000000000 -0700
@@ -23,6 +23,7 @@
  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
+#include <errno.h>
 #ifdef WIN32
 #define SHORT WIN_SHORT
 #include <windows.h>