diff --git a/external/fontconfig/UnpackedTarball_fontconfig.mk b/external/fontconfig/UnpackedTarball_fontconfig.mk
index a43a3db7f840..fdc476da3937 100644
--- a/external/fontconfig/UnpackedTarball_fontconfig.mk
+++ b/external/fontconfig/UnpackedTarball_fontconfig.mk
@@ -16,6 +16,7 @@ $(eval $(call gb_UnpackedTarball_set_patchlevel,fontconfig,0))
 $(eval $(call gb_UnpackedTarball_add_patches,fontconfig,\
 	external/fontconfig/fontconfig-2.12.1.patch.1 \
 	external/fontconfig/nowarnnoconfig.patch.1 \
+	external/fontconfig/apple-xlocale.patch.1 \
 ))
 
 ifneq ($(OS),MACOSX)
diff --git a/external/fontconfig/apple-xlocale.patch.1 b/external/fontconfig/apple-xlocale.patch.1
new file mode 100644
index 000000000000..af5744cb9326
--- /dev/null
+++ b/external/fontconfig/apple-xlocale.patch.1
@@ -0,0 +1,23 @@
+--- fontconfig/src/fcint.h.foo	2026-09-30 11:01:43
++++ fontconfig/src/fcint.h	2026-09-30 11:10:23
+@@ -44,6 +44,9 @@
+ #ifdef HAVE_UNISTD_H
+ #  include <unistd.h>
+ #endif
++#if defined(HAVE_XLOCALE_H) || defined(__APPLE__)
++#include <xlocale.h>
++#endif
+ #include <fontconfig/fontconfig.h>
+ #include <fontconfig/fcprivate.h>
+ 
+--- fontconfig/src/fcstr.c.foo	2026-09-30 11:05:33
++++ fontconfig/src/fcstr.c	2026-09-30 11:10:17
+@@ -28,7 +28,7 @@
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <string.h>
+-#ifdef HAVE_XLOCALE_H
++#if defined(HAVE_XLOCALE_H) || defined(__APPLE__)
+ #include <xlocale.h>
+ #endif
+