diff --git a/CHANGES b/CHANGES
index 293f334ab2..ae8ee7b149 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,5 @@
+ 719.	[bug]		Rapid reloads could trigger an assertion failure.
+			[RT #743]
 
  718.	[cleanup]	"internal" is no longer a reserved word in named.conf.
 			[RT #753, #731]
diff --git a/lib/dns/zone.c b/lib/dns/zone.c
index aae98278ab..39121c15bd 100644
--- a/lib/dns/zone.c
+++ b/lib/dns/zone.c
@@ -15,7 +15,7 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: zone.c,v 1.301 2001/01/30 02:50:48 bwelling Exp $ */
+/* $Id: zone.c,v 1.302 2001/01/31 05:22:55 marka Exp $ */
 
 #include <config.h>
 
@@ -891,6 +891,11 @@ dns_zone_load(dns_zone_t *zone) {
 
 	INSIST(zone->type != dns_zone_none);
 
+	if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADING)) {
+		result = ISC_R_SUCCESS;
+		goto cleanup;
+	}
+
 	if (zone->db != NULL && zone->masterfile == NULL) {
 		/*
 		 * The zone has no master file configured, but it already