diff --git a/biology/emboss/files/patch-ajax_core_ajfileio.c b/biology/emboss/files/patch-ajax_core_ajfileio.c
new file mode 100644
index 000000000000..b819ff5e1390
--- /dev/null
+++ b/biology/emboss/files/patch-ajax_core_ajfileio.c
@@ -0,0 +1,10 @@
+--- ajax/core/ajfileio.c.orig	2023-12-02 19:03:54 UTC
++++ ajax/core/ajfileio.c
+@@ -31,6 +31,7 @@
+ #include "ajfileio.h"
+ #include "ajutil.h"
+ #include "ajfile.h"
++#include "ajsys.h"
+ 
+ #include <string.h>
+ #include <errno.h>