diff --git a/sohstationviewer/model/mseed_data/mseed.py b/sohstationviewer/model/mseed_data/mseed.py
index 2b83c84501894870aed11fba3bc246cb7d0b2cc9..7c0d8da1e362e0e656c3497916467ba8cbdf9f7b 100644
--- a/sohstationviewer/model/mseed_data/mseed.py
+++ b/sohstationviewer/model/mseed_data/mseed.py
@@ -37,6 +37,8 @@ class MSeed(GeneralData):
             f"WHERE dataType='{self.data_type}'"
         )
         channels_db_info = execute_db_dict(channels_sql)
+        # dict containing some additional information about each channel. An
+        # example is whether to read all data points from a channel.
         self.channels_db_info = {
             channel_info['channel']: int(channel_info['readAllPoints'])
             for channel_info in channels_db_info