diff --git a/debian/changelog b/debian/changelog
index 8e2cc14..9b04dbb 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,11 @@
+qtwebkit-opensource-src (5.212.0~alpha4-13ubuntu1) jammy; urgency=medium
+
+  * d/p/webkit-javascript-s390x-segmentation-fault-fix.patch:
+    WebKit Javascript big endian/s390x segmentation-fault fix
+    (LP: #1951470)
+
+ -- Frank Heimes <frank.heimes@canonical.com>  Mon, 22 Nov 2021 18:50:37 +0100
+
 qtwebkit-opensource-src (5.212.0~alpha4-13) unstable; urgency=medium
 
   * Bump Standards-Version to 4.6.0, no changes needed.
diff --git a/debian/control b/debian/control
index 0221d7a..6ed714d 100644
--- a/debian/control
+++ b/debian/control
@@ -1,6 +1,7 @@
 Source: qtwebkit-opensource-src
 Priority: optional
-Maintainer: Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>
 Uploaders: Timo Jyrinki <timo@debian.org>,
            Lisandro Damián Nicanor Pérez Meyer <lisandro@debian.org>,
            Dmitry Shachnev <mitya57@debian.org>,
diff --git a/debian/patches/series b/debian/patches/series
index a369709..312acc9 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -5,3 +5,4 @@ bison_3.7.diff
 no_pdf_image_plugin.diff
 python_3.9.diff
 glib_2.68.diff
+webkit-javascript-s390x-segmentation-fault-fix.patch
diff --git a/debian/patches/webkit-javascript-s390x-segmentation-fault-fix.patch b/debian/patches/webkit-javascript-s390x-segmentation-fault-fix.patch
new file mode 100644
index 0000000..fd2e369
--- /dev/null
+++ b/debian/patches/webkit-javascript-s390x-segmentation-fault-fix.patch
@@ -0,0 +1,38 @@
+Description: WebKit Javascript big endian/s390x segmentation-fault fix
+ In CodeBlock.cpp the code preparing the operands of op_get_from_scope writes
+ the property offset as pointer size (hence 64 bit) value:
+ 2141: instructions[i + 6].u.pointer = reinterpret_cast<void*>(op.operand);
+ while the same slot is accessed later by the jitted code as 32 bit integer:
+ macro getProperty(slow)
+    loadisFromInstruction(6, t1)
+ This fails on big endian targets since the integer access takes the higher
+ part of the 64 bit value.
+ Changing:
+ macro getProperty(slow)
+    loadisFromInstruction(6, t1)
+ to
+ macro getProperty(slow)
+    loadpFromInstruction(6, t1)
+ in llint/LowLevelInterpreter64.asm fixes the problem
+ on big endian environments.
+
+Author: Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
+Origin: vendor, https://launchpadlibrarian.net/569624765/webkit-IBMZ-fix.patch
+Bug-IBM: IBM Bugzilla 195436
+Bug-Ubuntu: https://bugs.launchpad.net/bugs/1951470
+Forwarded: not-needed
+Reviewed-by: Frank Heimes <frank.heimes@canonical.com>
+Last-Update: 2021-11-22
+---
+This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
+--- a/Source/JavaScriptCore/llint/LowLevelInterpreter64.asm
++++ b/Source/JavaScriptCore/llint/LowLevelInterpreter64.asm
+@@ -2020,7 +2020,7 @@
+ end
+ 
+ macro getProperty(slow)
+-    loadisFromInstruction(6, t1)
++    loadpFromInstruction(6, t1)
+     loadPropertyAtVariableOffset(t1, t0, t2, slow)
+     valueProfile(t2, 7, t0)
+     loadisFromInstruction(1, t0)