diff --git a/MAC/APL/StationCU/src/StationControl/StationControl.h b/MAC/APL/StationCU/src/StationControl/StationControl.h
index 4edc6fa5de8d803a7007364fcf6cd3510fbd03be..410717da26a0259266a3946cbed9a031a67f2f9c 100644
--- a/MAC/APL/StationCU/src/StationControl/StationControl.h
+++ b/MAC/APL/StationCU/src/StationControl/StationControl.h
@@ -141,7 +141,7 @@ private:
 	int32					itsBitmode;
 
 	map<string, ActiveObs*>	itsObsMap;			// current running observations
-  map<string, bool> itsClaimedMap; // whether resources for the Obs are being or have been claimed
+  map<bool, ActiveObs*> itsClaimedMap; // whether resources for the Obs are being or have been claimed
 	ObsIter					itsStartingObs;		// the Obs that is being started is this moment.
 
 	// Availability information of Antenna's and circuit boards.