diff --git a/include/record_manager.hpp b/include/record_manager.hpp
index 2cdb8f9..2c5df36 100644
--- a/include/record_manager.hpp
+++ b/include/record_manager.hpp
@@ -3,6 +3,7 @@
 #include <atomic>
 #include <chrono>
 #include <filesystem>
+#include <mutex>
 #include <string>
 #include <thread>
 #include <unordered_map>