diff --git a/doc/protocol.rst b/doc/protocol.rst
index 185113b69..73f810210 100644
--- a/doc/protocol.rst
+++ b/doc/protocol.rst
@@ -412,7 +412,9 @@ Querying :program:`MPD`'s status
     - ``update``: a database update has started or finished.  If the database was modified during the update, the ``database`` event is also emitted.
     - ``stored_playlist``: a stored playlist has been modified, renamed, created or deleted
     - ``playlist``: the queue (i.e. the current playlist) has been modified
-    - ``player``: the player has been started, stopped or seeked
+    - ``player``: the player has been started, stopped or seeked or
+      tags of the currently playing song have changed (e.g. received
+      from stream)
     - ``mixer``: the volume has been changed
     - ``output``: an audio output has been added, removed or modified (e.g. renamed, enabled or disabled)
     - ``options``: options like repeat, random, crossfade, replay gain