diff --git a/sources/Modbus/PIHistorianManager.cpp b/sources/Modbus/PIHistorianManager.cpp
index e90e019..e843a74 100644
--- a/sources/Modbus/PIHistorianManager.cpp
+++ b/sources/Modbus/PIHistorianManager.cpp
@@ -14,6 +14,7 @@ CPIHistorianManager::CPIHistorianManager(CModbusRepository *PIHistorianRepo, int
 
     mHistorianTimer = new QTimer;
     mHistorianTimer->setSingleShot(true);
+    connect(mHistorianTimer,SIGNAL(timeout()),this,SLOT(HistorianTimerExpired()));
 
 
     mNbPassagesToday = 0;