diff --git a/gnome-keyring-c89.patch b/gnome-keyring-c89.patch
new file mode 100644
index 0000000..d24cb6c
--- /dev/null
+++ b/gnome-keyring-c89.patch
@@ -0,0 +1,21 @@
+S-expressions test: Call gkm_crypto_sign_xsa with correct size type
+
+The underlying type for gsize can be unsigned int, which is a distinct
+type from unsigned long (the type behind CK_ULONG). The mismatch
+results in compilation failures with GCC 14.
+
+Submitted upstream: <https://gitlab.gnome.org/GNOME/gnome-keyring/-/merge_requests/63>
+
+diff --git a/pkcs11/gkm/test-sexp.c b/pkcs11/gkm/test-sexp.c
+index ba104a0e5b776669..fccf672353ddf42f 100644
+--- a/pkcs11/gkm/test-sexp.c
++++ b/pkcs11/gkm/test-sexp.c
+@@ -224,7 +224,7 @@ test_sign_verify (Test *test, gconstpointer unused)
+ 	guchar data[] = TEST_DATA;
+ 	guchar data_size = TEST_DATA_SIZE;
+ 	guchar signature[128];
+-	gsize signature_size = 128;
++	CK_ULONG signature_size = 128;
+ 
+ 	/* RSA */
+ 	/* sign some data */
diff --git a/gnome-keyring.spec b/gnome-keyring.spec
index acf379f..fbb351f 100644
--- a/gnome-keyring.spec
+++ b/gnome-keyring.spec
@@ -6,7 +6,7 @@
 
 Name:           gnome-keyring
 Version:        42.1
-Release:        9%{?dist}
+Release:        10%{?dist}
 Summary:        Framework for managing passwords and other secrets
 
 License:        GPLv2+ and LGPLv2+
@@ -14,6 +14,7 @@ URL:            https://wiki.gnome.org/Projects/GnomeKeyring
 Source0:        https://download.gnome.org/sources/%{name}/42/%{name}-%{version}.tar.xz
 # https://gitlab.gnome.org/GNOME/gnome-keyring/-/merge_requests/52
 Patch0:         gnome-keyring-42.0-fix-strncpy.patch
+Patch1: gnome-keyring-c89.patch
 
 BuildRequires:  pkgconfig(gcr-3) >= %{gcr_version}
 BuildRequires:  pkgconfig(glib-2.0) >= %{glib2_version}
@@ -131,6 +132,9 @@ rm $RPM_BUILD_ROOT%{_libdir}/gnome-keyring/devel/*.la
 
 
 %changelog
+* Fri Jan 26 2024 Florian Weimer <fweimer@redhat.com> - 42.1-10
+- Fix C compatibility issue
+
 * Wed Jan 24 2024 Fedora Release Engineering <releng@fedoraproject.org> - 42.1-9
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild