diff --git a/debian/changelog b/debian/changelog
index aeded7f..c19274a 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -3,6 +3,8 @@ qt6-base (6.4.0+dfsg-4) UNRELEASED; urgency=medium
   [ Pino Toscano ]
   * Backport upstream commit e81cba0cd33339c2e5f5e3c670741605264b21c2 to support
     HPPA; patch upstream_Add-HPPA-detection.patch. (Closes: #1021404)
+  * Backport upstream commit ac17a394a5701174c705050640e26c9cb95d289b to support
+    M68k; patch upstream_Add-M68k-detection.patch.
 
  -- Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>  Sat, 08 Oct 2022 08:25:51 +0200
 
diff --git a/debian/patches/series b/debian/patches/series
index 6611bea..98eae72 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -1,5 +1,6 @@
 # fixed in 6.5
 upstream_Add-HPPA-detection.patch
+upstream_Add-M68k-detection.patch
 
 # Debian specific
 remove_privacy_breaches.diff
diff --git a/debian/patches/upstream_Add-M68k-detection.patch b/debian/patches/upstream_Add-M68k-detection.patch
new file mode 100644
index 0000000..47c1ebf
--- /dev/null
+++ b/debian/patches/upstream_Add-M68k-detection.patch
@@ -0,0 +1,84 @@
+From ac17a394a5701174c705050640e26c9cb95d289b Mon Sep 17 00:00:00 2001
+From: Pino Toscano <toscano.pino@tiscali.it>
+Date: Thu, 6 Oct 2022 23:17:57 +0200
+Subject: [PATCH] Add M68k detection
+
+- detect the M68k architecture (Motorola 68000) and define
+  Q_PROCESSOR_M68K
+- set the right machine type in QElfParser for M68k ELF files
+
+Change-Id: Ie5694abbe1ae2bfeb5692defba0ca6062c1d60ac
+Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
+---
+ src/corelib/global/archdetect.cpp           | 2 ++
+ src/corelib/global/qprocessordetection.h    | 9 +++++++++
+ src/corelib/global/qprocessordetection.qdoc | 9 +++++++++
+ src/corelib/plugin/qelfparser_p.cpp         | 3 +++
+ 4 files changed, 23 insertions(+)
+
+--- a/src/corelib/global/archdetect.cpp
++++ b/src/corelib/global/archdetect.cpp
+@@ -23,6 +23,8 @@
+ #  define ARCH_PROCESSOR "x86_64"
+ #elif defined(Q_PROCESSOR_IA64)
+ #  define ARCH_PROCESSOR "ia64"
++#elif defined(Q_PROCESSOR_M68K)
++#  define ARCH_PROCESSOR "m68k"
+ #elif defined(Q_PROCESSOR_MIPS_64)
+ #  define ARCH_PROCESSOR "mips64"
+ #elif defined(Q_PROCESSOR_MIPS)
+--- a/src/corelib/global/qprocessordetection.h
++++ b/src/corelib/global/qprocessordetection.h
+@@ -188,6 +188,15 @@
+ // Q_BYTE_ORDER not defined, use endianness auto-detection
+ 
+ /*
++    Motorola 68000 family, no revisions or variants
++
++    M68K is big-endian.
++*/
++#elif defined(__m68k__)
++#  define Q_PROCESSOR_M68K
++#  define Q_BYTE_ORDER Q_BIG_ENDIAN
++
++/*
+     MIPS family, known revisions: I, II, III, IV, 32, 64
+ 
+     MIPS is bi-endian, use endianness auto-detection implemented below.
+--- a/src/corelib/plugin/qelfparser_p.cpp
++++ b/src/corelib/plugin/qelfparser_p.cpp
+@@ -115,6 +115,8 @@ struct ElfMachineCheck
+             EM_BLACKFIN
+ #elif defined(Q_PROCESSOR_IA64)
+             EM_IA_64
++#elif defined(Q_PROCESSOR_M68K)
++            EM_68K
+ #elif defined(Q_PROCESSOR_MIPS)
+             EM_MIPS
+ #elif defined(Q_PROCESSOR_POWER_32)
+@@ -373,6 +375,7 @@ Q_DECL_UNUSED Q_DECL_COLD_FUNCTION stati
+     switch (r.machine) {
+     // list definitely not exhaustive!
+     case EM_NONE:       d << ", no machine"; break;
++    case EM_68K:        d << ", MC68000"; break;
+     case EM_ARM:        d << ", ARM"; break;
+     case EM_AARCH64:    d << ", AArch64"; break;
+ #ifdef EM_BLACKFIN
+--- a/src/corelib/global/qglobal.cpp
++++ b/src/corelib/global/qglobal.cpp
+@@ -1801,6 +1801,15 @@ bool qSharedBuild() noexcept
+ */
+ 
+ /*!
++    \macro Q_PROCESSOR_M68K
++    \relates <QtGlobal>
++
++    Defined if the application is compiled for Motorola 68000 processors.
++
++    \sa QSysInfo::buildCpuArchitecture()
++*/
++
++/*!
+     \macro Q_PROCESSOR_MIPS
+     \relates <QtGlobal>
+