diff --git a/doc/Changelog b/doc/Changelog
index 3215249c1..6d67cc166 100644
--- a/doc/Changelog
+++ b/doc/Changelog
@@ -1,6 +1,8 @@
 17 June 2019: Wouter
 	- Master contains version 1.9.3 in development.
 	- Fix #39: In libunbound, leftover logfile is close()d unpredictably.
+	- Fix for #24: Fix abort due to scan of auth zone masters using old
+	  address from previous scan.
 
 12 June 2019: Wouter
 	- Fix another spoolbuf storage code point, in prefetch.
diff --git a/services/authzone.c b/services/authzone.c
index 1426f423a..312abad8b 100644
--- a/services/authzone.c
+++ b/services/authzone.c
@@ -3698,6 +3698,7 @@ static void
 xfr_transfer_start_lookups(struct auth_xfer* xfr)
 {
 	/* delete all the looked up addresses in the list */
+	xfr->task_transfer->scan_addr = NULL;
 	xfr_masterlist_free_addrs(xfr->task_transfer->masters);
 
 	/* start lookup at the first master */
@@ -3728,6 +3729,7 @@ static void
 xfr_probe_start_lookups(struct auth_xfer* xfr)
 {
 	/* delete all the looked up addresses in the list */
+	xfr->task_probe->scan_addr = NULL;
 	xfr_masterlist_free_addrs(xfr->task_probe->masters);
 
 	/* start lookup at the first master */