diff --git a/src/InternalDoc.php b/src/InternalDoc.php
index 16ded383b7..c71777d44b 100644
--- a/src/InternalDoc.php
+++ b/src/InternalDoc.php
@@ -1350,6 +1350,13 @@ public function secretChatStatus(int $chat): int
     {
         return $this->wrapper->getAPI()->secretChatStatus($chat);
     }
+    /**
+     * Sends an updateCustomEvent update to the event handler.
+     */
+    public function sendCustomEvent(mixed $payload): void
+    {
+        $this->wrapper->getAPI()->sendCustomEvent($payload);
+    }
     /**
      * Set NOOP update handler, ignoring all updates.
      */
diff --git a/src/MTProtoTools/UpdateHandler.php b/src/MTProtoTools/UpdateHandler.php
index 99aab6f50d..63a282651b 100644
--- a/src/MTProtoTools/UpdateHandler.php
+++ b/src/MTProtoTools/UpdateHandler.php
@@ -630,4 +630,11 @@ private function handleUpdate(array $update): void
             UpdateHandlerType::GET_UPDATES => $this->signalUpdate(...),
         }, $update);
     }
+    /**
+     * Sends an updateCustomEvent update to the event handler.
+     */
+    public function sendCustomEvent(mixed $payload): void
+    {
+        $this->handleUpdate(['_' => 'updateCustomEvent', 'payload' => $payload]);
+    }
 }