diff --git a/test/_RecorderTests.cpp b/test/_RecorderTests.cpp
index 970cf1315b..1c6b10d1e5 100644
--- a/test/_RecorderTests.cpp
+++ b/test/_RecorderTests.cpp
@@ -10,6 +10,8 @@
 #include "RcclMockFuncs.hpp"
 //#include "TestBed.hpp"
 
+#include <thread>
+
 namespace RcclUnitTesting
 {
   /**