diff --git a/lib/libimhex/source/api/localization_manager.cpp b/lib/libimhex/source/api/localization_manager.cpp
index 4304eae54..28eb80054 100644
--- a/lib/libimhex/source/api/localization_manager.cpp
+++ b/lib/libimhex/source/api/localization_manager.cpp
@@ -6,6 +6,8 @@
 
 #include <nlohmann/json.hpp>
 
+#include <mutex>
+
 namespace hex {
 
     namespace LocalizationManager {