diff --git a/src/wallet/plain_wallet_api.cpp b/src/wallet/plain_wallet_api.cpp
index 943cd133..eceb536e 100644
--- a/src/wallet/plain_wallet_api.cpp
+++ b/src/wallet/plain_wallet_api.cpp
@@ -604,8 +604,9 @@ namespace plain_wallet
   {
     PLAIN_WALLET_BEGIN_TRY_ENTRY();
     GET_INSTANCE_PTR(inst_ptr);
-    return inst_ptr->gwm.invoke(h, params);
-    tools::sanitize_utf8(params);
+    std::string res = inst_ptr->gwm.invoke(h, params);
+    tools::sanitize_utf8(res);
+    return res;
     PLAIN_WALLET_CATCH();
   }