diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index ef1be630a..3b5d06fb4 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -5021,6 +5021,7 @@ UniValue z_sendmany(const UniValue& params, bool fHelp, const CPubKey& mypk)
             "3. minconf               (numeric, optional, default=1) Only use funds confirmed at least this many times.\n"
             "4. fee                   (numeric, optional, default="
             + strprintf("%s", FormatMoney(ASYNC_RPC_OPERATION_DEFAULT_MINERS_FEE)) + ") The fee amount to attach to this transaction.\n"
+            "5. opreturn              (string, optional) Hex encoded data for OP_RETURN.\n"
             "\nResult:\n"
             "\"operationid\"          (string) An operationid to pass to z_getoperationstatus to get the result of the operation.\n"
             "\nExamples:\n"
@@ -5152,8 +5153,7 @@ UniValue z_sendmany(const UniValue& params, bool fHelp, const CPubKey& mypk)
     CAmount nTotalOut = 0;
     // Optional OP_RETURN data
     CScript opret;
-    // TODO: enforce that only a single opreturn exists
-    UniValue opretValue;
+    UniValue opretValue = params.size() >= 4 ? params[4].get_str() : "";
 
     bool containsSaplingOutput = false;
 
@@ -5164,7 +5164,7 @@ UniValue z_sendmany(const UniValue& params, bool fHelp, const CPubKey& mypk)
         // sanity check, report error if unknown key-value pairs
         for (const string& name_ : o.getKeys()) {
             std::string s = name_;
-            if (s != "address" && s != "amount" && s!="memo" && s!="opreturn") {
+            if (s != "address" && s != "amount" && s!="memo") {
                 throw JSONRPCError(RPC_INVALID_PARAMETER, string("Invalid parameter, unknown key: ")+s);
             }
         }