diff --git a/src/modules/Playerbot/Humanization/Sessions/ActivitySession.h b/src/modules/Playerbot/Humanization/Sessions/ActivitySession.h
index ab916bca8..243d07373 100644
--- a/src/modules/Playerbot/Humanization/Sessions/ActivitySession.h
+++ b/src/modules/Playerbot/Humanization/Sessions/ActivitySession.h
@@ -21,6 +21,7 @@
 #include "ObjectGuid.h"
 #include <chrono>
 #include <string>
+#include <atomic>
 #include <vector>
 
 namespace Playerbot