+--- gdbm-1.13/export/export.c.orig 2017-01-02 12:51:49.000000000 +0100
++++ gdbm-1.13/export/export.c 2017-04-10 21:29:05.764751534 +0200
+@@ -23,6 +23,7 @@
+
+ #include <gdbm.h>
+
++#define GDBM_EXPORT_18
+ /* Pull in gdbm_export() */
+ #include "gdbmexp.c"
+
+--- gdbm-1.13/src/gdbmexp.c.orig 2017-01-02 12:51:49.000000000 +0100
++++ gdbm-1.13/src/gdbmexp.c 2017-04-10 21:35:32.624747118 +0200
+@@ -21,8 +21,13 @@
+ # include "autoconf.h"
+ # include <arpa/inet.h>
+
++#ifdef GDBM_EXPORT_18
++# define GDBM_SET_ERRNO(dbf, ec, fatal) gdbm_errno = ec
++# define GDBM_ASSERT_CONSISTENCY(dbf, val)
++#else
+ # include "gdbmdefs.h"
+ # include "gdbm.h"
++#endif
+
+ int
+ gdbm_export_to_file (GDBM_FILE dbf, FILE *fp)