diff --git a/source/RobotAPI/libraries/armem_robot_state/client/localization/TransformReader.h b/source/RobotAPI/libraries/armem_robot_state/client/localization/TransformReader.h
index 184fae2481188bbcc6e6f73a72c1dc47fa42d647..884d85255c22a19d84f72e2041b6134fa06573c9 100644
--- a/source/RobotAPI/libraries/armem_robot_state/client/localization/TransformReader.h
+++ b/source/RobotAPI/libraries/armem_robot_state/client/localization/TransformReader.h
@@ -22,6 +22,8 @@
 
 #pragma once
 
+#include <mutex>
+
 #include <RobotAPI/libraries/armem/client/MemoryNameSystem.h>
 #include <RobotAPI/libraries/armem/client/Reader.h>