--- a/libntp/lib/isc/unix/interfaceiter.c	2018-10-15 15:16:00.414796346 +0800
+++ a/libntp/lib/isc/unix/interfaceiter.c	2018-10-15 15:16:26.605794341 +0800
@@ -151,7 +151,7 @@ get_addr(unsigned int family, isc_netadd
 
 #ifdef __linux
 #define ISC_IF_INET6_SZ \
-    sizeof("00000000000000000000000000000001 01 80 10 80 XXXXXXloXXXXXXXX\n")
+    sizeof("00000000000000000000000000000001 00000001 80 10 80 XXXXXXloXXXXXXXX\n")
 static isc_result_t linux_if_inet6_next(isc_interfaceiter_t *);
 static isc_result_t linux_if_inet6_current(isc_interfaceiter_t *);
 static void linux_if_inet6_first(isc_interfaceiter_t *iter);