diff --git a/cores/esp8266/Updater.h b/cores/esp8266/Updater.h
index 8de16c7ed..9f5682f0d 100644
--- a/cores/esp8266/Updater.h
+++ b/cores/esp8266/Updater.h
@@ -80,7 +80,7 @@ class UpdaterClass {
       Should be equal to the remaining bytes when called
       Usable for slow streams like Serial
     */
-    size_t writeStream(Stream &data);
+    size_t writeStream(Stream &data, uint16_t streamTimeout = 60000);
 
     /*
       If all bytes are written