diff --git a/gnu/local.mk b/gnu/local.mk
index 34023909a1..8c4f052b75 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -1703,6 +1703,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/libmpeg2-global-symbol-test.patch	\
   %D%/packages/patches/libmygpo-qt-fix-qt-5.11.patch		\
   %D%/packages/patches/libmygpo-qt-missing-qt5-modules.patch	\
+  %D%/packages/patches/libpciaccess-hurd64.patch		\
   %D%/packages/patches/libphonenumber-reproducible-build.patch	\
   %D%/packages/patches/libqalculate-3.8.0-libcurl-ssl-fix.patch	\
   %D%/packages/patches/libquicktime-ffmpeg.patch 		\
diff --git a/gnu/packages/patches/libpciaccess-hurd64.patch b/gnu/packages/patches/libpciaccess-hurd64.patch
new file mode 100644
index 0000000000..f7e11059b1
--- /dev/null
+++ b/gnu/packages/patches/libpciaccess-hurd64.patch
@@ -0,0 +1,58 @@
+Upstream-status: Taken from upstream:
+
+<https://gitlab.freedesktop.org/xorg/lib/libpciaccess/-/commit/6cd5a4afbb70868c7746de8d50dea59e02e9acf2>.
+
+From 6cd5a4afbb70868c7746de8d50dea59e02e9acf2 Mon Sep 17 00:00:00 2001
+From: Flavio Cruz <flaviocruz@gmail.com>
+Date: Wed, 28 Jun 2023 01:02:34 -0400
+Subject: [PATCH] Fix compilation warnings when building against hurd-amd64.
+Content-Transfer-Encoding: 8bit
+Content-Type: text/plain; charset=UTF-8
+
+Passes mach_msg_type_number_t instead of size_t which have different
+sizes. Example warning:
+
+/hurd_pci.c:101:53: warning: passing argument 3 of 'pci_get_dev_regions' from incompatible pointer type [-Wincompatible-pointer-types]
+  101 |     err = pci_get_dev_regions(d->device_port, &buf, &size);
+      |                                                     ^~~~~
+      |                                                     |
+      |                                                     size_t * {aka long unsigned int *}
+---
+ src/hurd_pci.c | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/src/hurd_pci.c b/src/hurd_pci.c
+index 8653e1b..9ac3813 100644
+--- a/src/hurd_pci.c
++++ b/src/hurd_pci.c
+@@ -82,7 +82,7 @@ pci_device_hurd_probe(struct pci_device *dev)
+     struct pci_bar regions[6];
+     struct pci_xrom_bar rom;
+     struct pci_device_private *d;
+-    size_t size;
++    mach_msg_type_number_t size;
+     char *buf;
+ 
+     /* Many of the fields were filled in during initial device enumeration.
+@@ -323,7 +323,7 @@ pciclient_cfg_read(mach_port_t device_port, int reg, char *buf,
+                    size_t * nbytes)
+ {
+     int err;
+-    size_t nread;
++    mach_msg_type_number_t nread;
+     char *data;
+ 
+     data = buf;
+@@ -473,7 +473,7 @@ simple_readdir(mach_port_t port, uint32_t *first_entry)
+ {
+     char *data;
+     int nentries = 0;
+-    vm_size_t size;
++    mach_msg_type_number_t size;
+ 
+     dir_readdir (port, &data, &size, *first_entry, 1, 0, &nentries);
+ 
+-- 
+Janneke Nieuwenhuizen <janneke@gnu.org>  | GNU LilyPond https://LilyPond.org
+Freelance IT https://www.JoyOfSource.com | Avatar® https://AvatarAcademy.com
+
diff --git a/gnu/packages/xorg.scm b/gnu/packages/xorg.scm
index 0de08a4ad1..b106a604a7 100644
--- a/gnu/packages/xorg.scm
+++ b/gnu/packages/xorg.scm
@@ -36,7 +36,7 @@
 ;;; Copyright © 2021 Lu Hui <luhux76@gmail.com>
 ;;; Copyright © 2022 Petr Hodina <phodina@protonmail.com>
 ;;; Copyright © 2023 Zheng Junjie <873216071@qq.com>
-;;; Copyright © 2023 Janneke Nieuwenhuizen <janneke@gnu.org>
+;;; Copyright © 2023, 2024 Janneke Nieuwenhuizen <janneke@gnu.org>
 ;;; Copyright © 2023, 2024 John Kehayias <john.kehayias@protonmail.com>
 ;;; Copyright © 2023, 2024 Kaelyn Takata <kaelyn.alexi@protonmail.com>
 ;;;
@@ -1157,16 +1157,17 @@ (define-public libpciaccess
             "12glp4w1kgvmqn89lk19cgr6jccd3awxra4dxisp7pagi06rsk11"))))
     (build-system gnu-build-system)
     (arguments
-     '(;; Make sure libpciaccess can read compressed 'pci.ids' files as
-       ;; provided by pciutils.
-       #:configure-flags
-       (list "--with-zlib"
+     (list
+      ;; Make sure libpciaccess can read compressed 'pci.ids' files as
+      ;; provided by pciutils.
+      #:configure-flags
+      #~(list "--with-zlib"
              (string-append "--with-pciids-path="
                             (assoc-ref %build-inputs "pciutils")
                             "/share/hwdata"))
 
        #:phases
-       (modify-phases %standard-phases
+       #~(modify-phases %standard-phases
          (add-after 'install 'add-L-zlib
            (lambda* (#:key inputs outputs #:allow-other-keys)
              ;; Provide '-LZLIB/lib' next to '-lz' in the .la file.
@@ -1175,7 +1176,15 @@ (define-public libpciaccess
                (substitute* (string-append out "/lib/libpciaccess.la")
                  (("-lz")
                   (string-append "-L" zlib "/lib -lz")))
-               #t))))))
+               #t)))
+         #$@(if (target-hurd64?)
+                #~((add-after 'unpack 'apply-hurd64-patch
+                     (lambda _
+                       (let ((patch-file
+                              #$(local-file
+                                 (search-patch "libpciaccess-hurd64.patch"))))
+                         (invoke "patch" "--force" "-p1" "-i" patch-file)))))
+                #~()))))
     (inputs
      (list zlib pciutils))                   ;for 'pci.ids.gz'
     (native-inputs
