diff --git a/Thread.cc b/Thread.cc
index 739fd60..3c4e5ef 100644
--- a/Thread.cc
+++ b/Thread.cc
@@ -4,6 +4,7 @@ static_assert( __cplusplus > 2020'99 );
 
 #include <stop_token>
 #include <condition_variable>
+#include <thread>
 
 #include <Alepha/Utility/StaticValue.h>
 #include <Alepha/Utility/evaluation_helpers.h>