diff --git a/src/util/Constants.js b/src/util/Constants.js
index 97dafca3c..ab99a742c 100644
--- a/src/util/Constants.js
+++ b/src/util/Constants.js
@@ -745,6 +745,7 @@ exports.Colors = {
  * * UNKNOWN_TOKEN
  * * UNKNOWN_USER
  * * UNKNOWN_EMOJI
+ * * UNKNOWN_WEBHOOK
  * * BOT_PROHIBITED_ENDPOINT
  * * BOT_ONLY_ENDPOINT
  * * MAXIMUM_GUILDS
@@ -791,6 +792,7 @@ exports.APIErrors = {
   UNKNOWN_TOKEN: 10012,
   UNKNOWN_USER: 10013,
   UNKNOWN_EMOJI: 10014,
+  UNKNOWN_WEBHOOK: 10015,
   BOT_PROHIBITED_ENDPOINT: 20001,
   BOT_ONLY_ENDPOINT: 20002,
   MAXIMUM_GUILDS: 30001,