diff --git a/src/asio_connection.h b/src/asio_connection.h
index 02d8ec94..8be709c2 100644
--- a/src/asio_connection.h
+++ b/src/asio_connection.h
@@ -158,7 +158,7 @@ private:
   /// Buffer for incoming data.
   boost::array<uint8_t, 8192> buffer_;
 
-  boost::array<uint8_t, 16394> outbuf_;
+  boost::array<uint8_t, 65536> outbuf_;
 
   bool writing_;
 };