diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index 3b5d06fb4..0193f9fd2 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -5153,7 +5153,10 @@ UniValue z_sendmany(const UniValue& params, bool fHelp, const CPubKey& mypk)
     CAmount nTotalOut = 0;
     // Optional OP_RETURN data
     CScript opret;
-    UniValue opretValue = params.size() >= 4 ? params[4].get_str() : "";
+    UniValue opretValue;
+    if(params.size() == 5) {
+        opretValue = params[4].get_str();
+    }
 
     bool containsSaplingOutput = false;