diff --git a/test/unittest/xtypes/XTypesTests.cpp b/test/unittest/xtypes/XTypesTests.cpp
index fc9183149b..ddbaeb8b93 100644
--- a/test/unittest/xtypes/XTypesTests.cpp
+++ b/test/unittest/xtypes/XTypesTests.cpp
@@ -14,6 +14,7 @@
 
 #include <array>
 #include <chrono>
+#include <condition_variable>
 #include <mutex>
 #include <set>
 #include <thread>