diff --git a/backport-On-gcc-12-dont-use-num-fast-path.patch b/backport-On-gcc-12-dont-use-num-fast-path.patch
new file mode 100644
index 0000000000000000000000000000000000000000..bd29d0b578602d61301a04b1b0d227962776fbdf
--- /dev/null
+++ b/backport-On-gcc-12-dont-use-num-fast-path.patch
@@ -0,0 +1,36 @@
+From ab0beceae7b589b2f6c270cc91cc38a86e8f28ea Mon Sep 17 00:00:00 2001
+From: Behdad Esfahbod <behdad@behdad.org>
+Date: Tue, 23 Sep 2025 10:22:22 -0400
+Subject: [PATCH] On gcc <= 12 don't use num fast path
+
+Fixes https://github.com/harfbuzz/harfbuzz/issues/5456
+---
+ src/hb-algs.hh | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/src/hb-algs.hh b/src/hb-algs.hh
+index 7dfa9769699..d87daa1d3d0 100644
+--- a/src/hb-algs.hh
++++ b/src/hb-algs.hh
+@@ -92,6 +92,7 @@ template <typename Type>
+ struct __attribute__((packed)) hb_packed_t { Type v; };
+ 
+ #ifndef HB_FAST_NUM_ACCESS
++
+ #if defined(__OPTIMIZE__) && \
+     defined(__BYTE_ORDER) && \
+     (__BYTE_ORDER == __BIG_ENDIAN || \
+@@ -102,6 +103,13 @@ struct __attribute__((packed)) hb_packed_t { Type v; };
+ #else
+ #define HB_FAST_NUM_ACCESS 0
+ #endif
++
++// https://github.com/harfbuzz/harfbuzz/issues/5456
++#if defined(__GNUC__) && !defined(__clang__) && (__GNUC__ <= 12)
++#undef HB_FAST_NUM_ACCESS
++#define HB_FAST_NUM_ACCESS 0
++#endif
++
+ #endif
+ 
+ template <bool BE, typename Type, int Bytes = sizeof (Type)>
diff --git a/harfbuzz-11.5.0.tar.xz b/harfbuzz-11.5.1.tar.xz
similarity index 32%
rename from harfbuzz-11.5.0.tar.xz
rename to harfbuzz-11.5.1.tar.xz
index 2547d4cedef7608d5ac84230e7468ba4e6459933..7bddb7299fac7073e868ed7f94a20e3fde69e491 100644
--- a/harfbuzz-11.5.0.tar.xz
+++ b/harfbuzz-11.5.1.tar.xz
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:2d30ba45c4c8ec4de661a1002b4f88d0841ff1a3087f34629275f5436d722109
-size 18154144
+oid sha256:972a60a8d274d49e70361da6920c3a73dfb0fb4387f6c6811906a47ba634d8a1
+size 18212420
diff --git a/harfbuzz.spec b/harfbuzz.spec
index c5a8bbc58f1c8204b5868a10907f72ffa746875a..bbf9e5384257079409fa6a95e4073935b02cf0ce 100644
--- a/harfbuzz.spec
+++ b/harfbuzz.spec
@@ -1,11 +1,12 @@
 Name:           harfbuzz
-Version:        11.5.0
+Version:        11.5.1
 Release:        1
 Summary:        A text shaping engine
 License:        MIT-Modern-Variant
 URL:            https://harfbuzz.github.io/
 Source0:        https://github.com/harfbuzz/harfbuzz/releases/download/%{version}/harfbuzz-%{version}.tar.xz
-
+# https://github.com/harfbuzz/harfbuzz/pull/5578
+Patch6001:      backport-On-gcc-12-dont-use-num-fast-path.patch
 BuildRequires:  meson >= 0.60.0
 BuildRequires:  gobject-introspection-devel
 BuildRequires:  gtk-doc
@@ -48,7 +49,7 @@ Header files and libraries for building a extension library for %{name}.
 %meson_install
 
 %check
-%meson_test || cat %{_vpath_builddir}/meson-logs/testlog.txt
+%meson_test
 
 %files
 %doc AUTHORS NEWS
@@ -75,6 +76,9 @@ Header files and libraries for building a extension library for %{name}.
 %{_datadir}/gtk-doc/html/harfbuzz
 
 %changelog
+* Wed Sep 24 2025 Funda Wang <fundawang@yeah.net> - 11.5.1-1
+- update to 11.5.1
+
 * Sat Sep 13 2025 Funda Wang <fundawang@yeah.net> - 11.5.0-1
 - update to 11.5.0