diff --git a/lib/hx509/ks_dir.c b/lib/hx509/ks_dir.c
index cffa00728..9ce9b5c8e 100644
--- a/lib/hx509/ks_dir.c
+++ b/lib/hx509/ks_dir.c
@@ -93,10 +93,6 @@ dir_free(hx509_certs certs, void *data)
     return 0;
 }
 
-#ifdef SunOS
-#define dirfd(x) ((x)->dd_fd)
-#endif
-
 static int
 dir_iter_start(hx509_context context,
 	       hx509_certs certs, void *data, void **cursor)