diff --git a/src/core/hle/service/time/time_zone_content_manager.h b/src/core/hle/service/time/time_zone_content_manager.h
index 02bbbadac..52dd1a020 100644
--- a/src/core/hle/service/time/time_zone_content_manager.h
+++ b/src/core/hle/service/time/time_zone_content_manager.h
@@ -21,7 +21,7 @@ namespace Service::Time::TimeZone {
 
 class TimeZoneContentManager final {
 public:
-    TimeZoneContentManager(Core::System& system);
+    explicit TimeZoneContentManager(Core::System& system);
 
     void Initialize(TimeManager& time_manager);