diff --git a/CHANGES b/CHANGES
index 02915a303b..4e23fa28ad 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+5112.	[bug]		Named/named-checkconf could dump core if there was
+			a missing masters clause and a bad notify clause.
+			[GL #779]
+
 5111.	[bug]		Occluded DNSKEY records could make it into the
 			delegating NSEC/NSEC3 bitmap. [GL #742]
 
diff --git a/bin/tests/system/checkconf/bad-stub-masters-dialup.conf b/bin/tests/system/checkconf/bad-stub-masters-dialup.conf
new file mode 100644
index 0000000000..3b19323471
--- /dev/null
+++ b/bin/tests/system/checkconf/bad-stub-masters-dialup.conf
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+controls { /* empty */ };
+options {
+	query-source address 10.53.0.2;
+	notify-source 10.53.0.2;
+	transfer-source 10.53.0.2;
+	port 5300;
+	pid-file "named.pid";
+	listen-on { 10.53.0.2; };
+	listen-on-v6 { none; };
+	heartbeat-interval 2;
+	recursion no;
+};
+zone "." {
+	type hint;
+	file "hint";
+};
+zone "example." {
+	type stub;
+	dialup notify;
+	notify no;
+	file "example.bk";
+	// masters { 10.53.0.1; };
+};
diff --git a/lib/bind9/check.c b/lib/bind9/check.c
index d8352910ce..d6fba22500 100644
--- a/lib/bind9/check.c
+++ b/lib/bind9/check.c
@@ -2276,10 +2276,10 @@ check_zoneconf(const cfg_obj_t *zconfig, const cfg_obj_t *voptions,
 	if (ztype == CFG_ZONE_MASTER || ztype == CFG_ZONE_SLAVE ||
 	    ztype == CFG_ZONE_STUB)
 	{
-		const cfg_obj_t *dialup = NULL;
-		(void)cfg_map_get(zoptions, "dialup", &dialup);
-		if (dialup != NULL && cfg_obj_isstring(dialup)) {
-			const char *str = cfg_obj_asstring(dialup);
+		obj = NULL;
+		(void)cfg_map_get(zoptions, "dialup", &obj);
+		if (obj != NULL && cfg_obj_isstring(obj)) {
+			const char *str = cfg_obj_asstring(obj);
 			for (i = 0;
 			     i < sizeof(dialups) / sizeof(dialups[0]);
 			     i++)
diff --git a/util/copyrights b/util/copyrights
index 67b432cfc0..4fa7bb345c 100644
--- a/util/copyrights
+++ b/util/copyrights
@@ -737,6 +737,7 @@
 ./bin/tests/system/checkconf/bad-sharedzone1.conf	CONF-C	2013,2016,2018
 ./bin/tests/system/checkconf/bad-sharedzone2.conf	CONF-C	2013,2016,2018
 ./bin/tests/system/checkconf/bad-sharedzone3.conf	CONF-C	2018
+./bin/tests/system/checkconf/bad-stub-masters-dialup.conf	CONF-C	2018
 ./bin/tests/system/checkconf/bad-tsig.conf	CONF-C	2012,2013,2016,2018
 ./bin/tests/system/checkconf/bad-update-policy1.conf	CONF-C	2018
 ./bin/tests/system/checkconf/bad-update-policy10.conf	CONF-C	2018