diff --git a/helios/datatypes/legacy.py b/helios/datatypes/legacy.py
index 3ed88d2b1cf1a7cb38f237a3517880d8f8feb9db..766ed9212b028b109fa42d2182922f348d28aab2 100644
--- a/helios/datatypes/legacy.py
+++ b/helios/datatypes/legacy.py
@@ -41,7 +41,7 @@ class EncryptedAnswerWithRandomness(LegacyObject):
         'choices': arrayOf('legacy/EGCiphertext'),
         'individual_proofs': arrayOf('legacy/EGZKDisjunctiveProof'),
         'overall_proof' : 'legacy/EGZKDisjunctiveProof',
-        'randomness' : 'core/BigInteger'
+        'randomness' : arrayOf('core/BigInteger')
         }
 
 class EncryptedVote(LegacyObject):