diff --git a/RTCP/Storage/src/MeasurementSetFormat.cc b/RTCP/Storage/src/MeasurementSetFormat.cc
index bbd1c1ab4cd83ee5000c52059bf998d43b86bd62..58f3dad60e58c86c8082ec5fe0305bcbfd0049bf 100644
--- a/RTCP/Storage/src/MeasurementSetFormat.cc
+++ b/RTCP/Storage/src/MeasurementSetFormat.cc
@@ -206,7 +206,7 @@ void MeasurementSetFormat::fillAntenna (const Block<MPosition>& antMPos)
     msantCol.stationId().put (i, 0);
     msantCol.station().put (i, "LOFAR");
     msantCol.type().put (i, "GROUND-BASED");
-    msantCol.mount().put (i, "FIXED");
+    msantCol.mount().put (i, "X-Y");
     msantCol.positionMeas().put (i, antMPos[i]);
     msantCol.offset().put (i, antOffset);
     msantCol.dishDiameter().put (i, 0);