diff --git a/src/rm/RequestManagerVirtualMachine.cc b/src/rm/RequestManagerVirtualMachine.cc
index 294df632508..c22e0fbdb05 100644
--- a/src/rm/RequestManagerVirtualMachine.cc
+++ b/src/rm/RequestManagerVirtualMachine.cc
@@ -2666,7 +2666,7 @@ void VirtualMachinePoolCalculateShowback::request_execute(
         return;
     }
 
-    success_response("", att);
+    success_response(string(""), att);
 
     return;
 }