diff --git a/bind.spec b/bind.spec
index 46ef4d9..32e6e26 100644
--- a/bind.spec
+++ b/bind.spec
@@ -82,6 +82,7 @@ Patch130:bind-9.9.1-P2-dlz-libdb.patch
 Patch131:bind-9.9.1-P2-multlib-conflict.patch
 Patch133:bind99-rh640538.patch
 Patch134:bind97-rh669163.patch
+Patch135:bind99-rh985918.patch
 
 # SDB patches
 Patch11: bind-9.3.2b2-sdbsrc.patch
@@ -321,6 +322,7 @@ cp -fp contrib/sdb/sqlite/zone2sqlite.c bin/sdb_tools
 %endif
 %patch133 -p1 -b .rh640538
 %patch134 -p1 -b .rh669163
+%patch135 -p1 -b .rh985918
 
 # Sparc and s390 arches need to use -fPIE
 %ifarch sparcv9 sparc64 s390 s390x
@@ -920,6 +922,7 @@ rm -rf ${RPM_BUILD_ROOT}
 - Update to 9.9.6
 - drop merged patches and rebase some of existing patches
 - Add architecture specific dependencies.
+- Fix assert in dig when using +sigchase (#985918)
 
 * Fri Aug 15 2014 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 32:9.9.5-9.P1
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_21_22_Mass_Rebuild
diff --git a/bind99-rh985918.patch b/bind99-rh985918.patch
new file mode 100644
index 0000000..6d900d2
--- /dev/null
+++ b/bind99-rh985918.patch
@@ -0,0 +1,83 @@
+From 7d891eaf911e5cab1f704615f8f1ef87c8716f46 Mon Sep 17 00:00:00 2001
+From: Mark Andrews <marka@isc.org>
+Date: Wed, 1 Oct 2014 10:01:54 +1000
+Subject: [PATCH] 3962.   [bug]           'dig +topdown +trace +sigchase'
+ address unhandled error                         conditions. [RT #34663]
+
+---
+ bin/dig/dighost.c | 31 ++++++++++++++++++++++++++-----
+ 1 file changed, 26 insertions(+), 5 deletions(-)
+
+diff --git a/bin/dig/dighost.c b/bin/dig/dighost.c
+index c99dcfc..aeded9e 100644
+--- a/bin/dig/dighost.c
++++ b/bin/dig/dighost.c
+@@ -56,6 +56,7 @@
+ #include <dns/log.h>
+ #include <dns/message.h>
+ #include <dns/name.h>
++#include <dns/rcode.h>
+ #include <dns/rdata.h>
+ #include <dns/rdataclass.h>
+ #include <dns/rdatalist.h>
+@@ -4489,6 +4490,9 @@ chase_scanname_section(dns_message_t *msg, dns_name_t *name,
+ 	dns_rdataset_t *rdataset;
+ 	dns_name_t *msg_name = NULL;
+ 
++	if (msg->counts[section] == 0)
++		return (NULL);
++
+ 	do {
+ 		dns_message_currentname(msg, section, &msg_name);
+ 		if (dns_name_compare(msg_name, name) == 0) {
+@@ -5297,6 +5301,20 @@ sigchase_td(dns_message_t *msg)
+ 	isc_boolean_t have_answer = ISC_FALSE;
+ 	isc_boolean_t true = ISC_TRUE;
+ 
++	if (msg->rcode != dns_rcode_noerror &&
++	    msg->rcode != dns_rcode_nxdomain) {
++		char buf[20];
++		isc_buffer_t b;
++
++		isc_buffer_init(&b, buf, sizeof(buf));
++		result = dns_rcode_totext(msg->rcode, &b);
++		check_result(result, "dns_rcode_totext failed");
++		printf("error response code %.*s\n", 
++		       (int)isc_buffer_usedlength(&b), buf);
++		error_message = msg;
++		return;	
++	}
++
+ 	if ((result = dns_message_firstname(msg, DNS_SECTION_ANSWER))
+ 	    == ISC_R_SUCCESS) {
+ 		dns_message_currentname(msg, DNS_SECTION_ANSWER, &name);
+@@ -5309,10 +5327,13 @@ sigchase_td(dns_message_t *msg)
+ 		if (!current_lookup->trace_root_sigchase) {
+ 			result = dns_message_firstname(msg,
+ 						       DNS_SECTION_AUTHORITY);
+-			if (result == ISC_R_SUCCESS)
+-				dns_message_currentname(msg,
+-							DNS_SECTION_AUTHORITY,
+-							&name);
++			if (result != ISC_R_SUCCESS) {
++				printf("no answer or authority section\n");
++				error_message = msg;
++				return;
++			}
++			dns_message_currentname(msg, DNS_SECTION_AUTHORITY,
++						&name);
+ 			chase_nsrdataset
+ 				= chase_scanname_section(msg, name,
+ 							 dns_rdatatype_ns,
+@@ -5322,7 +5343,7 @@ sigchase_td(dns_message_t *msg)
+ 			if (chase_nsrdataset != NULL) {
+ 				have_delegation_ns = ISC_TRUE;
+ 				printf("no response but there is a delegation"
+-				       " in authority section:");
++				       " in authority section: ");
+ 				dns_name_print(name, stdout);
+ 				printf("\n");
+ 			} else {
+-- 
+1.8.2.3
+