diff --git a/esphomeyaml/espota2.py b/esphomeyaml/espota2.py
index 5eaaccd669..bb9963d8ff 100755
--- a/esphomeyaml/espota2.py
+++ b/esphomeyaml/espota2.py
@@ -200,6 +200,7 @@ def perform_ota(sock, password, file_handle, filename):
 
     receive_exactly(sock, 1, 'receive OK', RESPONSE_RECEIVE_OK)
     receive_exactly(sock, 1, 'Update end', RESPONSE_UPDATE_END_OK)
+    send_check(sock, RESPONSE_OK, 'end acknowledgement')
 
     _LOGGER.info("OTA successful")