diff --git a/Images/px4io-v2.prototype b/Images/px4io-v2.prototype
index af87924e90..57589314f1 100644
--- a/Images/px4io-v2.prototype
+++ b/Images/px4io-v2.prototype
@@ -7,6 +7,7 @@
     "summary": "PX4IOv2",
     "version": "2.0",
     "image_size": 0,
+    "image_maxsize": 61440,
     "git_identity": "",
     "board_revision": 0
 }