diff --git a/lib/dns/rdata/in_1/dhcid_49.c b/lib/dns/rdata/in_1/dhcid_49.c
index e653aca742..3f70dc4a09 100644
--- a/lib/dns/rdata/in_1/dhcid_49.c
+++ b/lib/dns/rdata/in_1/dhcid_49.c
@@ -153,7 +153,7 @@ tostruct_in_dhcid(ARGS_TOSTRUCT) {
 	if (dhcid->dhcid == NULL) {
 		return ISC_R_NOMEMORY;
 	}
-
+	dhcid->length = region.length;
 	dhcid->mctx = mctx;
 	return ISC_R_SUCCESS;
 }