--- a/lib/libutil/bcrypt_pbkdf.c	2019-11-21 19:13:39.000000000 +0300
+++ b/lib/libutil/bcrypt_pbkdf.c	2020-10-15 17:25:45.569164914 +0300
@@ -16,6 +16,7 @@
  */
 
 #include <sys/types.h>
+#include <sys/cdefs.h>
 
 #include <stdint.h>
 #include <stdlib.h>