diff --git a/desktop/toolkit/qt5/qt5-webengine/files/qtbug-86752.patch b/desktop/toolkit/qt5/qt5-webengine/files/qtbug-86752.patch
new file mode 100644
index 0000000000..b62f08f26d
--- /dev/null
+++ b/desktop/toolkit/qt5/qt5-webengine/files/qtbug-86752.patch
@@ -0,0 +1,44 @@
+From 4e828b3bd2d410151dc2574d084bed631dac42ca Mon Sep 17 00:00:00 2001
+From: Daniel McArdle <dmcardle@chromium.org>
+Date: Thu, 16 Apr 2020 20:18:47 +0000
+Subject: [Backport] Fix for bug 1071327
+
+Manual backport of patch originally reviewed on
+https://chromium-review.googlesource.com/c/chromium/src/+/2153325:
+Avoid nullptr dereference in RTCPeerConnectionHandler
+
+Bug: 1071327
+Fixes: QTBUG-86752
+Change-Id: Icf4189905dc5c95854b5af4b3e5e25e0607dd39e
+Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
+---
+ .../renderer/modules/peerconnection/rtc_peer_connection_handler.cc  | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/src/3rdparty/chromium/third_party/blink/renderer/modules/peerconnection/rtc_peer_connection_handler.cc b/src/3rdparty/chromium/third_party/blink/renderer/modules/peerconnection/rtc_peer_connection_handler.cc
+index 5a68327ee08..371f25c781e 100644
+--- a/src/3rdparty/chromium/third_party/blink/renderer/modules/peerconnection/rtc_peer_connection_handler.cc
++++ b/src/3rdparty/chromium/third_party/blink/renderer/modules/peerconnection/rtc_peer_connection_handler.cc
+@@ -2319,7 +2319,8 @@ void RTCPeerConnectionHandler::OnRemoveReceiverPlanB(uintptr_t receiver_id) {
+ 
+ void RTCPeerConnectionHandler::OnModifySctpTransport(
+     blink::WebRTCSctpTransportSnapshot state) {
+-  client_->DidModifySctpTransport(state);
++  if (client_)
++    client_->DidModifySctpTransport(state);
+ }
+ 
+ void RTCPeerConnectionHandler::OnModifyTransceivers(
+@@ -2446,7 +2447,8 @@ void RTCPeerConnectionHandler::OnIceCandidateError(const String& host_candidate,
+ }
+ 
+ void RTCPeerConnectionHandler::OnInterestingUsage(int usage_pattern) {
+-  client_->DidNoteInterestingUsage(usage_pattern);
++  if (client_)
++    client_->DidNoteInterestingUsage(usage_pattern);
+ }
+ 
+ webrtc::SessionDescriptionInterface*
+-- 
+cgit v1.2.1
+
diff --git a/desktop/toolkit/qt5/qt5-webengine/pspec.xml b/desktop/toolkit/qt5/qt5-webengine/pspec.xml
index eaecf9203e..c63bdfbe75 100755
--- a/desktop/toolkit/qt5/qt5-webengine/pspec.xml
+++ b/desktop/toolkit/qt5/qt5-webengine/pspec.xml
@@ -77,7 +77,7 @@
             <Dependency>libxkbcommon-devel</Dependency>
         </BuildDependencies>
         <Patches>
-<!--             <Patch level="1">dark-mode-crash.patch</Patch> -->
+            <Patch level="1">qtbug-86752.patch</Patch>
 <!--             <Patch level="1">qtbug-69605.patch</Patch> -->
         </Patches>
     </Source>
@@ -168,6 +168,13 @@
     </Package>
 
     <History>
+        <Update release="21">
+            <Date>2020-10-01</Date>
+            <Version>5.15.1</Version>
+            <Comment>Rebuild.</Comment>
+            <Name>Mustafa Cinasal</Name>
+            <Email>muscnsl@gmail.com</Email>
+        </Update>
         <Update release="20">
             <Date>2020-09-09</Date>
             <Version>5.15.1</Version>