diff --git a/CHANGES b/CHANGES
index f1193d09a7..226534ea38 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,6 @@
+5459.	[bug]		Bad isc_mem_put() size when an invalid type was
+			specified in a update-policy rule. [GL #1990]
+
 5458.	[bug]		Prevent a theoretically possible NULL dereference caused
 			by a data race between zone_maintenance() and
 			dns_zone_setview_helper(). [GL #1627]
diff --git a/bin/named/zoneconf.c b/bin/named/zoneconf.c
index 4bd79ed6cc..486877df55 100644
--- a/bin/named/zoneconf.c
+++ b/bin/named/zoneconf.c
@@ -334,7 +334,7 @@ configure_zone_ssutable(const cfg_obj_t *zconfig, dns_zone_t *zone,
 					    ISC_LOG_ERROR,
 					    "'%.*s' is not a valid type",
 					    (int)r.length, str);
-				isc_mem_put(mctx, types, n * sizeof(types));
+				isc_mem_put(mctx, types, n * sizeof(*types));
 				goto cleanup;
 			}
 		}