diff --git a/raspberry-pi/common/config-txt.nix b/raspberry-pi/common/config-txt.nix
index 59dbc75f..a3b5569e 100644
--- a/raspberry-pi/common/config-txt.nix
+++ b/raspberry-pi/common/config-txt.nix
@@ -95,7 +95,7 @@ in
             (attrsOf molecule)
           ];
         in
-        attrsOf molecule;
+        attrsOf molecule // { description = "config.txt setting type"; };
       default = { };
       description = ''
         Structured configuration for the Raspberry Pi `config.txt` file.