diff --git a/src/ip.c b/src/ip.c
index 10e0d43dcf3a68cf1d408b523be466fed7105141..aec9eb40c89687ff5c0d805781a2c1f421eaba9d 100644
--- a/src/ip.c
+++ b/src/ip.c
@@ -2446,7 +2446,7 @@ DMLEAF tIPInterfaceIPv6PrefixParams[] = {
 {"Origin", &DMREAD, DMT_STRING, get_IPInterfaceIPv6Prefix_Origin, NULL, BBFDM_BOTH},
 //{"StaticType", &DMWRITE, DMT_STRING, get_IPInterfaceIPv6Prefix_StaticType, set_IPInterfaceIPv6Prefix_StaticType, BBFDM_BOTH},
 {"ParentPrefix", &DMWRITE, DMT_STRING, get_IPInterfaceIPv6Prefix_ParentPrefix, set_IPInterfaceIPv6Prefix_ParentPrefix, BBFDM_BOTH, DM_FLAG_REFERENCE},
-{"ChildPrefixBits", &DMWRITE, DMT_STRING, get_IPInterfaceIPv6Prefix_ChildPrefixBits, set_IPInterfaceIPv6Prefix_ChildPrefixBits, BBFDM_BOTH},
+{"ChildPrefixBits", &DMWRITE, DMT_STRING, get_IPInterfaceIPv6Prefix_ChildPrefixBits, set_IPInterfaceIPv6Prefix_ChildPrefixBits, BBFDM_BOTH, DM_FLAG_LINKER},
 //{"OnLink", &DMWRITE, DMT_BOOL, get_IPInterfaceIPv6Prefix_OnLink, set_IPInterfaceIPv6Prefix_OnLink, BBFDM_BOTH},
 //{"Autonomous", &DMWRITE, DMT_BOOL, get_IPInterfaceIPv6Prefix_Autonomous, set_IPInterfaceIPv6Prefix_Autonomous, BBFDM_BOTH},
 {"PreferredLifetime", &DMWRITE, DMT_TIME, get_IPInterfaceIPv6Prefix_PreferredLifetime, set_IPInterfaceIPv6Prefix_PreferredLifetime, BBFDM_BOTH},