diff --git a/libc/include/netdb.h b/libc/include/netdb.h
index 7fcb11f..95f0986 100644
--- a/libc/include/netdb.h
+++ b/libc/include/netdb.h
@@ -192,6 +192,8 @@
  */
 #define	SCOPE_DELIMITER	'%'
 
+#define IPPORT_RESERVED 1024
+
 __BEGIN_DECLS
 
 /* BIONIC-BEGIN */