diff --git a/host/tests/compat_test.cpp b/host/tests/compat_test.cpp

index b5ba6e475..233989093 100644

--- a/host/tests/compat_test.cpp

+++ b/host/tests/compat_test.cpp

@@ -4,6 +4,7 @@

 // SPDX-License-Identifier: GPL-3.0-or-later

 //

+#include <cstdint>

 #include <uhdlib/utils/compat_check.hpp>

 #include <boost/test/unit_test.hpp>