diff --git a/src/server/game/Scripting/ScriptMgr.cpp b/src/server/game/Scripting/ScriptMgr.cpp
index b35aa9760b7..d51b12bee81 100644
--- a/src/server/game/Scripting/ScriptMgr.cpp
+++ b/src/server/game/Scripting/ScriptMgr.cpp
@@ -484,7 +484,7 @@ class CreatureGameObjectScriptRegistrySwapHooks
             }
         };
 
-        AIFunctionMapWorker<typename std::decay<decltype(evaluator)>::type> worker(std::move(evaluator));
+        AIFunctionMapWorker<std::decay_t<decltype(evaluator)>> worker(std::move(evaluator));
         TypeContainerVisitor<decltype(worker), MapStoredObjectTypesContainer> containerVisitor(worker);
 
         containerVisitor.Visit(map->GetObjectsStore());