diff --git a/iat-verifier/dev_scripts/generate-sample-iat.py b/iat-verifier/dev_scripts/generate-sample-iat.py
index 5c9d35b..cc0fdc8 100755
--- a/iat-verifier/dev_scripts/generate-sample-iat.py
+++ b/iat-verifier/dev_scripts/generate-sample-iat.py
@@ -89,7 +89,7 @@
     sk = SigningKey.from_pem(open(keyfile, 'rb').read())
     token = cbor2.dumps(token_map)
     verifier = PSAIoTProfile1TokenVerifier.get_verifier()
-    signed_token = sign_eat(token, verifier, sk)
+    signed_token = sign_eat(token, verifier, add_p_header=False, key=sk)
 
     with open(outfile, 'wb') as wfh:
         wfh.write(signed_token)