use the actual header

diff --git a/lib/dns/rbtdb.c b/lib/dns/rbtdb.c
index 10e010c4bfffa185804549f3e04a82bc91973857..d491b6a45a062d2de7ae98ec157c2490424b53fe 100644 (file)
--- a/lib/dns/rbtdb.c
+++ b/lib/dns/rbtdb.c
@@ -8730,6 +8730,7 @@ rdataset_clearprefetch(dns_rdataset_t *rdataset) {
        dns_rbtnode_t *rbtnode = rdataset->private2;
        rdatasetheader_t *header = rdataset->private3;
 
+       header--;
        NODE_LOCK(&rbtdb->node_locks[rbtnode->locknum].lock,
                  isc_rwlocktype_write);
        header->attributes &= ~RDATASET_ATTR_PREFETCH;