diff --git a/src/xrpld/rpc/detail/TransactionSign.cpp b/src/xrpld/rpc/detail/TransactionSign.cpp
index aa7c706a19..9f4cec763b 100644
--- a/src/xrpld/rpc/detail/TransactionSign.cpp
+++ b/src/xrpld/rpc/detail/TransactionSign.cpp
@@ -1097,7 +1097,11 @@ checkMultiSignFields(Json::Value const& jvRequest)
     if (!tx_json.isMember(sfSigningPubKey.getJsonName()))
         return RPC::missing_field_error("tx_json.SigningPubKey");
 
-    if (!tx_json[sfSigningPubKey.getJsonName()].asString().empty())
+    // Multi-signing into a signature_target object field is fine,
+    // because it means the signature is not for the transaction
+    // Account.
+    if (!jvRequest.isMember(jss::signature_target) &&
+        !tx_json[sfSigningPubKey.getJsonName()].asString().empty())
         return RPC::make_error(
             rpcINVALID_PARAMS,
             "When multi-signing 'tx_json.SigningPubKey' must be empty.");