diff --git a/src/obidmscolumn.c b/src/obidmscolumn.c
index 0077ff2..50b9be7 100644
--- a/src/obidmscolumn.c
+++ b/src/obidmscolumn.c
@@ -905,7 +905,10 @@ OBIDMS_column_p obi_clone_column(OBIDMS_p dms, const char* column_name, obiversi
 	// TODO copy header->comments?
 
 	if (clone_data)
+	{
 		memcpy(new_column->data, column_to_clone->data, nb_lines*nb_elements_per_line*sizeof(data_type));
+		(new_column->header)->lines_used = nb_lines;
+	}
 
 	return new_column;
 }