diff --git a/somafm_tui/config.py b/somafm_tui/config.py
index 95d1fd7..0e0aae3 100644
--- a/somafm_tui/config.py
+++ b/somafm_tui/config.py
@@ -72,6 +72,9 @@ class Config:
     volume: int = 70
     visualizer: str = "both"
     autoplay: bool = False
+    #: Publish what is playing to the desktop media session (MPRIS on Linux,
+    #: macOS Now Playing via mpv) and honour the media keys.  The JSON key is
+    #: spelled ``mpris`` for backwards compatibility.
     mpris: bool = True
 
     @classmethod