diff --git a/CEP/DP3/AOFlagger/include/AOFlagger/msio/timefrequencydata.h b/CEP/DP3/AOFlagger/include/AOFlagger/msio/timefrequencydata.h
index d252c6137abd3ea52f077021648fa5b88d4707b3..10c120dcd7f7d6b160ac16005e27cf06c1227c99 100644
--- a/CEP/DP3/AOFlagger/include/AOFlagger/msio/timefrequencydata.h
+++ b/CEP/DP3/AOFlagger/include/AOFlagger/msio/timefrequencydata.h
@@ -330,6 +330,8 @@ class TimeFrequencyData
 				if(polarisation == XXPolarisation || polarisation == XYPolarisation || polarisation == YXPolarisation || polarisation == YYPolarisation || polarisation == StokesIPolarisation || polarisation == SinglePolarisation)
 				return _flagging[0];
 			}
+			else if(_flagCoverage==GlobalFlagCoverage)
+				return _flagging[0];
 			throw BadUsageException("Mask requested that was not available in the given time frequency data");
 		}