diff --git a/channels/chan_pjsip.c b/channels/chan_pjsip.c
index 7cab428731..247e04d2ab 100644
--- a/channels/chan_pjsip.c
+++ b/channels/chan_pjsip.c
@@ -1372,8 +1372,7 @@ static int update_connected_line_information(void *data)
 			int generate_new_sdp;
 
 			method = session->endpoint->id.refresh_method;
-			if (session->inv_session->invite_tsx
-				&& (session->inv_session->options & PJSIP_INV_SUPPORT_UPDATE)) {
+			if (session->inv_session->options & PJSIP_INV_SUPPORT_UPDATE) {
 				method = AST_SIP_SESSION_REFRESH_METHOD_UPDATE;
 			}
 
diff --git a/configs/samples/pjsip.conf.sample b/configs/samples/pjsip.conf.sample
index ed5f93e71e..c05938ea5f 100644
--- a/configs/samples/pjsip.conf.sample
+++ b/configs/samples/pjsip.conf.sample
@@ -608,8 +608,15 @@
 ;direct_media_glare_mitigation=none     ; Mitigation of direct media re INVITE
                                         ; glare (default: "none")
 ;direct_media_method=invite     ; Direct Media method type (default: "invite")
-;connected_line_method=invite   ; Connected line method type (default:
-                                ; "invite")
+;connected_line_method=invite   ; Connected line method type.
+                                ; When set to "invite", check the remote's
+                                ; Allow header and if UPDATE is allowed, send
+                                ; UPDATE instead of INVITE to avoid SDP
+                                ; renegotiation.  If UPDATE is not Allowed,
+                                ; send INVITE.
+                                ; If set to "update", send UPDATE regardless
+                                ; of what the remote Allows.
+                                ; (default: "invite")
 ;direct_media=yes       ; Determines whether media may flow directly between
                         ; endpoints (default: "yes")
 ;disable_direct_media_on_nat=no ; Disable direct media session refreshes when
diff --git a/res/res_pjsip.c b/res/res_pjsip.c
index e717fdb40f..9581e7cb55 100644
--- a/res/res_pjsip.c
+++ b/res/res_pjsip.c
@@ -193,11 +193,18 @@
 					<description>
 						<para>Method used when updating connected line information.</para>
 						<enumlist>
-							<enum name="invite" />
+							<enum name="invite">
+							<para>When set to <literal>invite</literal>, check the remote's Allow header and
+							if UPDATE is allowed, send UPDATE instead of INVITE to avoid SDP
+							renegotiation.  If UPDATE is not Allowed, send INVITE.</para>
+							</enum>
 							<enum name="reinvite">
 								<para>Alias for the <literal>invite</literal> value.</para>
 							</enum>
-							<enum name="update" />
+							<enum name="update">
+							<para>If set to <literal>update</literal>, send UPDATE regardless of what the remote
+							Allows. </para>
+							</enum>
 						</enumlist>
 					</description>
 				</configOption>
diff --git a/third-party/pjproject/patches/0070-Set-PJSIP_INV_SUPPORT_UPDATE-correctly-in-pjsip_inv_.patch b/third-party/pjproject/patches/0070-Set-PJSIP_INV_SUPPORT_UPDATE-correctly-in-pjsip_inv_.patch
new file mode 100644
index 0000000000..9238e3ec9f
--- /dev/null
+++ b/third-party/pjproject/patches/0070-Set-PJSIP_INV_SUPPORT_UPDATE-correctly-in-pjsip_inv_.patch
@@ -0,0 +1,29 @@
+From 1193681959816effa121c4470748d5faa3a59272 Mon Sep 17 00:00:00 2001
+From: George Joseph <gjoseph@digium.com>
+Date: Thu, 29 Jun 2017 13:42:10 -0600
+Subject: [PATCH] Set PJSIP_INV_SUPPORT_UPDATE correctly in
+ pjsip_inv_verify_request3
+
+pjsip_inv_verify_request3 was setting rem_options when UPDATE was
+detected in the Allow header.  That's just an internal variable and
+doesn't go anywhere.  It's '*options' that needs to be set.
+---
+ pjsip/src/pjsip-ua/sip_inv.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/pjsip/src/pjsip-ua/sip_inv.c b/pjsip/src/pjsip-ua/sip_inv.c
+index fbc8ebe..6db7e6b 100644
+--- a/pjsip/src/pjsip-ua/sip_inv.c
++++ b/pjsip/src/pjsip-ua/sip_inv.c
+@@ -1237,7 +1237,7 @@ PJ_DEF(pj_status_t) pjsip_inv_verify_request3(pjsip_rx_data *rdata,
+ 
+ 	if (i != allow->count) {
+ 	    /* UPDATE is present in Allow */
+-	    rem_option |= PJSIP_INV_SUPPORT_UPDATE;
++	    *options |= PJSIP_INV_SUPPORT_UPDATE;
+ 	}
+ 
+     }
+-- 
+2.9.4
+