diff --git a/src/ripple/protocol/impl/InnerObjectFormats.cpp b/src/ripple/protocol/impl/InnerObjectFormats.cpp
index 0115da527..9ba6c33e0 100644
--- a/src/ripple/protocol/impl/InnerObjectFormats.cpp
+++ b/src/ripple/protocol/impl/InnerObjectFormats.cpp
@@ -44,8 +44,8 @@ InnerObjectFormats::InnerObjectFormats()
         sfSigner.getCode(),
         {
             {sfAccount, soeREQUIRED},
-            {sfSigningPubKey, soeREQUIRED},
-            {sfTxnSignature, soeREQUIRED},
+            {sfSigningPubKey, soeOPTIONAL},
+            {sfTxnSignature, soeOPTIONAL},
             {sfSigners, soeOPTIONAL},
         });