diff --git a/protocol/errors.json b/protocol/errors.json
index 32226b7..3c4e434 100644
--- a/protocol/errors.json
+++ b/protocol/errors.json
@@ -28,6 +28,7 @@
   "40022": "API Streamer has been shut down",
   "40023": "Action requires a newer protocol version",
   "40024": "unable to get channel history (incompatible site)",
+  "40025": "API no longer supported",
   "40030": "Invalid publish request (unspecified)",
   "40031": "Invalid publish request (invalid client-specified id)",
   "40032": "Invalid publish request (impermissible extras field)",