diff --git a/telethon/network/mtproto_sender.py b/telethon/network/mtproto_sender.py
index 2b50cf2c..9bc1fb1a 100755
--- a/telethon/network/mtproto_sender.py
+++ b/telethon/network/mtproto_sender.py
@@ -198,6 +198,8 @@ class MtProtoSender:
         if code == 0xf35c6d01:  # rpc_result, (response of an RPC call, i.e., we sent a request)
             return self.handle_rpc_result(msg_id, sequence, reader, request)
 
+        if code == 0x347773c5:  # pong
+            return self.handle_pong(msg_id, sequence, reader, request)
         if code == 0x73f1f8dc:  # msg_container
             return self.handle_container(msg_id, sequence, reader, request)
         if code == 0x3072cfa1:  # gzip_packed
@@ -235,6 +237,15 @@ class MtProtoSender:
 
         return False
 
+    def handle_pong(self, msg_id, sequence, reader, request):
+        reader.read_int(signed=False)  # code
+        recv_msg_id = reader.read_long(signed=False)
+
+        if recv_msg_id == request.msg_id:
+            request.confirm_received = True
+
+        return False
+
     def handle_container(self, msg_id, sequence, reader, request):
         reader.read_int(signed=False)  # code
         size = reader.read_int()