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>