diff --git a/gstlal-inspiral/python/streamthinca.py b/gstlal-inspiral/python/streamthinca.py
index c51e7888b852dec01a13c7314cb08fb8959ba4d9..170ee6bb22165468fa70c128c0031f4311d86b5e 100644
--- a/gstlal-inspiral/python/streamthinca.py
+++ b/gstlal-inspiral/python/streamthinca.py
@@ -162,14 +162,14 @@ class last_coincs(object):
 		# when making these, we can't use .copy() method of Table
 		# instances because we need to ensure we have a Table
 		# subclass, not a DBTable subclass
-		new_process_table = ligolw_elem.appendChild(lsctables.New(lsctables.ProcessTable, self.process_table.columnnames))
-		new_process_params_table = ligolw_elem.appendChild(lsctables.New(lsctables.ProcessParamsTable, self.process_params_table.columnnames))
-		new_sngl_inspiral_table = ligolw_elem.appendChild(lsctables.New(lsctables.SnglInspiralTable, self.sngl_inspiral_table.columnnames))
-		new_coinc_def_table = ligolw_elem.appendChild(lsctables.New(lsctables.CoincDefTable, self.coinc_def_table.columnnames))
-		new_coinc_event_table = ligolw_elem.appendChild(lsctables.New(lsctables.CoincTable, self.coinc_event_table.columnnames))
-		new_coinc_inspiral_table = ligolw_elem.appendChild(lsctables.New(lsctables.CoincInspiralTable, self.coinc_inspiral_table.columnnames))
-		new_coinc_event_map_table = ligolw_elem.appendChild(lsctables.New(lsctables.CoincMapTable, self.coinc_event_map_table.columnnames))
-		new_time_slide_table = ligolw_elem.appendChild(lsctables.New(lsctables.TimeSlideTable, self.time_slide_table.columnnames))
+		new_process_table = ligolw_elem.appendChild(lsctables.New(lsctables.ProcessTable, self.process_table.columnnamesreal))
+		new_process_params_table = ligolw_elem.appendChild(lsctables.New(lsctables.ProcessParamsTable, self.process_params_table.columnnamesreal))
+		new_sngl_inspiral_table = ligolw_elem.appendChild(lsctables.New(lsctables.SnglInspiralTable, self.sngl_inspiral_table.columnnamesreal))
+		new_coinc_def_table = ligolw_elem.appendChild(lsctables.New(lsctables.CoincDefTable, self.coinc_def_table.columnnamesreal))
+		new_coinc_event_table = ligolw_elem.appendChild(lsctables.New(lsctables.CoincTable, self.coinc_event_table.columnnamesreal))
+		new_coinc_inspiral_table = ligolw_elem.appendChild(lsctables.New(lsctables.CoincInspiralTable, self.coinc_inspiral_table.columnnamesreal))
+		new_coinc_event_map_table = ligolw_elem.appendChild(lsctables.New(lsctables.CoincMapTable, self.coinc_event_map_table.columnnamesreal))
+		new_time_slide_table = ligolw_elem.appendChild(lsctables.New(lsctables.TimeSlideTable, self.time_slide_table.columnnamesreal))
 
 		new_coinc_def_table.append(self.coinc_def)
 		coincevent = self.coinc_event_index[coinc_event_id]