diff --git a/Trigger/TrigEvent/TrigSteeringEvent/TrigSteeringEvent/OnlineErrorCode.h b/Trigger/TrigEvent/TrigSteeringEvent/TrigSteeringEvent/OnlineErrorCode.h
index f0267ae53bdc090453bd7b926602aba365719070..d4ffd746e857727c78ca893efdb81ebb0836c0de 100644
--- a/Trigger/TrigEvent/TrigSteeringEvent/TrigSteeringEvent/OnlineErrorCode.h
+++ b/Trigger/TrigEvent/TrigSteeringEvent/TrigSteeringEvent/OnlineErrorCode.h
@@ -51,9 +51,11 @@ namespace HLT {
       default: return "UNDEFINED OnlineErrorCode"; break;
     }
   }
-}
 
 inline std::ostream& operator<< (std::ostream& os, const HLT::OnlineErrorCode code) {
   return os << HLT::OnlineErrorCodeToString(code);
 }
+
+} // namespace HLT
+
 #endif // TRIGSTEERINGEVENT_OnlineErrorCode_H