diff --git a/include/state-machine_pool.hpp b/include/state-machine_pool.hpp
index 722b5b7..f05121f 100755
--- a/include/state-machine_pool.hpp
+++ b/include/state-machine_pool.hpp
@@ -35,7 +35,7 @@ class StateMachinePool {
         }
 
         void Update(const std::string &id) {
-            auto &machine = machines.find(id);
+            auto &machine = machines.find(id)->second;
             auto &owner = machine->GetOwner();
             const std::string &current = machine->GetCurrentStateId();