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-rw-r--r--src/dhcpv6-ia.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/dhcpv6-ia.c b/src/dhcpv6-ia.c
index 639e368..c378c09 100644
--- a/src/dhcpv6-ia.c
+++ b/src/dhcpv6-ia.c
@@ -896,6 +896,9 @@ static size_t build_ia(uint8_t *buf, size_t buflen, uint16_t status,
if (prefix_valid > leasetime)
prefix_valid = leasetime;
+ if (prefix_pref > prefix_valid)
+ prefix_pref = prefix_valid;
+
if (a->flags & OAF_DHCPV6_PD) {
struct dhcpv6_ia_prefix o_ia_p = {
.type = htons(DHCPV6_OPT_IA_PREFIX),