diff --git a/libisds.changes b/libisds.changes
index 3026a0c..130dc9f 100644
--- a/libisds.changes
+++ b/libisds.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Fri Jun  5 05:17:39 UTC 2020 - Jiri Slaby <jslaby@suse.com>
+
+- add tests-Fix-building-with-GCC-10.patch
+
 -------------------------------------------------------------------
 Thu Nov 28 12:37:33 UTC 2019 - Jiri Slaby <jslaby@suse.com>
 
diff --git a/libisds.spec b/libisds.spec
index 3fc3116..70a4875 100644
--- a/libisds.spec
+++ b/libisds.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package libisds
 #
-# Copyright (c) 2019 SUSE LLC
+# Copyright (c) 2020 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -27,6 +27,7 @@ URL:            http://xpisar.wz.cz/libisds/
 Source0:        http://xpisar.wz.cz/%{name}/dist/%{name}-%{version}.tar.xz
 Source1:        http://xpisar.wz.cz/%{name}/dist/%{name}-%{version}.tar.xz.asc
 Source2:        %{name}.keyring
+Patch0:         tests-Fix-building-with-GCC-10.patch
 BuildRequires:  docbook-xsl-stylesheets
 BuildRequires:  gpg2
 BuildRequires:  libgcrypt-devel
diff --git a/tests-Fix-building-with-GCC-10.patch b/tests-Fix-building-with-GCC-10.patch
new file mode 100644
index 0000000..9f2b1e9
--- /dev/null
+++ b/tests-Fix-building-with-GCC-10.patch
@@ -0,0 +1,54 @@
+From: =?utf8?q?Petr=20P=C3=ADsa=C5=99?= <petr.pisar@atlas.cz>
+Date: Wed, 22 Jan 2020 19:13:50 +0100
+Subject: [PATCH 1/1] tests: Fix building with GCC 10
+Git-commit: ce92ec266ccccc90b7a8cb0264b997dab27c10f9
+Patch-mainline: yes
+
+GCC 10 defaults to -fno-common resulting into errors about a multiple
+definitions of variables that where defined instead of declared by
+a mistake in a header file that is included into more compilations
+units.
+---
+ test/test.c | 3 +++
+ test/test.h | 9 +++++----
+ 2 files changed, 8 insertions(+), 4 deletions(-)
+
+diff --git a/test/test.c b/test/test.c
+index 00e2ddb..6abd774 100644
+--- a/test/test.c
++++ b/test/test.c
+@@ -17,8 +17,11 @@
+ #include <unistd.h>
+ 
+ /* Global variables for each test unit */
++char *unit_name = NULL;
+ char *reason = NULL;
++unsigned int passed, failed, skipped;
+ void (*test_destructor_function)(void *) = NULL;
++void *test_destructor_argument = NULL;
+ 
+ /* Print formated string into automtically reallocated @uffer.
+  * @buffer automatically reallocated buffer. Must be &NULL or preallocated
+diff --git a/test/test.h b/test/test.h
+index 63f22f9..1559a9d 100644
+--- a/test/test.h
++++ b/test/test.h
+@@ -14,10 +14,11 @@
+ 
+ #include "test-tools.h"
+ 
+-char *unit_name, *reason;
+-unsigned int passed, failed, skipped;
+-void (*test_destructor_function)(void *);
+-void *test_destructor_argument;
++extern char *unit_name;
++extern char *reason;
++extern unsigned int passed, failed, skipped;
++extern void (*test_destructor_function)(void *);
++extern void *test_destructor_argument;
+ 
+ #define INIT_TEST(name) { \
+     setlocale(LC_ALL, "C"); \
+-- 
+2.11.4.GIT
+