diff --git a/bugfix-of-gcc10.patch b/bugfix-of-gcc10.patch
new file mode 100644
index 0000000..90de559
--- /dev/null
+++ b/bugfix-of-gcc10.patch
@@ -0,0 +1,24 @@
+diff -Nur umockdev-0.11.3/Makefile.am umockdev-0.11.3-new/Makefile.am
+--- umockdev-0.11.3/Makefile.am	2018-05-01 19:01:00.000000000 +0800
++++ umockdev-0.11.3-new/Makefile.am	2021-08-04 11:42:00.000000000 +0800
+@@ -261,6 +261,8 @@
+ tests_test_ioctl_tree_SOURCES =	\
+ 	src/ioctl_tree.c	\
+ 	tests/test-ioctl-tree.c	\
++	src/debug.h		        \
++	src/debug.c		        \
+ 	$(NULL)
+ 
+ tests_test_ioctl_tree_CFLAGS =	\
+diff -Nur umockdev-0.11.3/src/debug.h umockdev-0.11.3-new/src/debug.h
+--- umockdev-0.11.3/src/debug.h	2018-05-01 19:01:00.000000000 +0800
++++ umockdev-0.11.3-new/src/debug.h	2021-08-04 11:42:53.000000000 +0800
+@@ -13,7 +13,7 @@
+ #define DBG_IOCTL   (1 << 3)
+ #define DBG_IOCTL_TREE (1 << 4)
+ 
+-unsigned debug_categories;
++extern unsigned debug_categories;
+ 
+ void init_debug(void) __attribute__((constructor));
+ 
diff --git a/umockdev.spec b/umockdev.spec
index 2a22cc4..fc755c7 100644
--- a/umockdev.spec
+++ b/umockdev.spec
@@ -1,12 +1,14 @@
 Name:             umockdev
 Version:          0.11.3
-Release:          4
+Release:          5
 Summary:          Mock hardware devices
 License:          LGPLv2+
 URL:              https://github.com/martinpitt/%{name}
 Source0:          https://github.com/martinpitt/%{name}/archive/%{version}.tar.gz
 
 Patch0000:        fix-glibc-update-error.patch
+Patch0001:        bugfix-of-gcc10.patch
+
 BuildRequires:    autoconf automake libtool gtk-doc gobject-introspection-devel glib2-devel
 BuildRequires:    libgudev1-devel systemd-devel vala chrpath python3 gphoto2
 
@@ -61,6 +63,9 @@ rm -rf $RPM_BUILD_ROOT/%{_datadir}/doc/umockdev
 %{_datadir}/vala/vapi/umockdev-1.0.vapi
 
 %changelog
+* Wed Aug 4 2021 wutao <tushenmei@huawei.com> - 0.11.3-5
+- bugfix-of-gcc10.patch
+
 * Sat Jun 26 2021 wutao <wutao61@huawei.com> - 0.11.3-4
 - fix build error due to glibc update