diff --git a/ethosu/vela/tflite/CustomOptionsFormat.py b/ethosu/vela/tflite/CustomOptionsFormat.py
index c2fc07c..bef384c 100644
--- a/ethosu/vela/tflite/CustomOptionsFormat.py
+++ b/ethosu/vela/tflite/CustomOptionsFormat.py
@@ -4,3 +4,4 @@
 
 class CustomOptionsFormat(object):
     FLEXBUFFERS = 0
+