diff --git a/plugins/completion/coq-thirdparty.nix b/plugins/completion/coq-thirdparty.nix
index 394577e9..6835626e 100644
--- a/plugins/completion/coq-thirdparty.nix
+++ b/plugins/completion/coq-thirdparty.nix
@@ -34,21 +34,24 @@ in {
           };
         };
       });
-      description = "List of sources";
+      description = ''
+        List of sources.
+        Each source is a free-form type, so additional settings like `accept_key` may be specified even if they are not declared by nixvim.
+      '';
       default = [];
       example = [
         {
           src = "nvimlua";
-          shortName = "nLUA";
+          short_name = "nLUA";
         }
         {
           src = "vimtex";
-          shortName = "vTEX";
+          short_name = "vTEX";
         }
         {
           src = "copilot";
-          shortName = "COP";
-          acceptKey = "<c-f>";
+          short_name = "COP";
+          accept_key = "<c-f>";
         }
         {src = "demo";}
       ];