diff --git a/hamlib-add-stdlib-header.patch b/hamlib-add-stdlib-header.patch
new file mode 100644
index 0000000..eacedcd
--- /dev/null
+++ b/hamlib-add-stdlib-header.patch
@@ -0,0 +1,11 @@
+diff -up Hamlib-4.5.5/tests/memload.c.aaaa Hamlib-4.5.5/tests/memload.c
+--- Hamlib-4.5.5/tests/memload.c.aaaa	2024-09-27 00:26:05.524462705 +0200
++++ Hamlib-4.5.5/tests/memload.c	2024-09-27 00:28:25.596543302 +0200
+@@ -23,6 +23,7 @@
+ 
+ #include <hamlib/rig.h>
+ #include "misc.h"
++#include <stdlib.h>
+ 
+ #ifdef HAVE_XML2
+ #  include <libxml/parser.h>
diff --git a/hamlib.changes b/hamlib.changes
index 2a28f99..6eb7388 100644
--- a/hamlib.changes
+++ b/hamlib.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Thu Sep 26 22:51:51 UTC 2024 - Wojciech Kazubski <wk@ire.pw.edu.pl>
+
+- add patch hamlib-add-stdlib-header.patch to fix the build for
+  Tumbleweed
+
 -------------------------------------------------------------------
 Mon May 22 18:36:53 UTC 2023 - Andreas Stieger <Andreas.Stieger@gmx.de>
 
diff --git a/hamlib.spec b/hamlib.spec
index 7eec7b7..4c1b8bf 100644
--- a/hamlib.spec
+++ b/hamlib.spec
@@ -29,6 +29,7 @@ Source2:        https://github.com/Hamlib/Hamlib/releases/download/%{version}/%{
 # taken from debian
 Source3:        %{name}.keyring
 Patch0:         hamlib-3.0-perl_install.patch
+Patch1:         hamlib-add-stdlib-header.patch
 BuildRequires:  fdupes
 BuildRequires:  gcc-c++
 BuildRequires:  libtool