diff --git a/Unreal/CarlaUE4/CarlaUE4.uproject b/Unreal/CarlaUE4/CarlaUE4.uproject
index 73d43e363..22c8354fb 100644
--- a/Unreal/CarlaUE4/CarlaUE4.uproject
+++ b/Unreal/CarlaUE4/CarlaUE4.uproject
@@ -1,6 +1,6 @@
 {
 	"FileVersion": 3,
-	"EngineAssociation": "4.19",
+	"EngineAssociation": "4.18",
 	"Category": "",
 	"Description": "",
 	"Modules": [
@@ -97,4 +97,4 @@
 			"Enabled": false
 		}
 	]
-}
\ No newline at end of file
+}
diff --git a/Unreal/CarlaUE4/Plugins/Carla/Source/Carla/Walker/WalkerAIController.cpp b/Unreal/CarlaUE4/Plugins/Carla/Source/Carla/Walker/WalkerAIController.cpp
index 9beb0be6a..a8819f049 100644
--- a/Unreal/CarlaUE4/Plugins/Carla/Source/Carla/Walker/WalkerAIController.cpp
+++ b/Unreal/CarlaUE4/Plugins/Carla/Source/Carla/Walker/WalkerAIController.cpp
@@ -225,7 +225,7 @@ void AWalkerAIController::OnMoveCompleted(
   ChangeStatus(EWalkerStatus::MoveCompleted);
 }
 
-void AWalkerAIController::SenseActors(const TArray<AActor *>& Actors)
+void AWalkerAIController::SenseActors(TArray<AActor *> Actors)
 {
   const auto *aPawn = GetPawn();
   if ((Status == EWalkerStatus::Moving) &&
diff --git a/Unreal/CarlaUE4/Plugins/Carla/Source/Carla/Walker/WalkerAIController.h b/Unreal/CarlaUE4/Plugins/Carla/Source/Carla/Walker/WalkerAIController.h
index 9ff8f5fb2..cc218d1f7 100644
--- a/Unreal/CarlaUE4/Plugins/Carla/Source/Carla/Walker/WalkerAIController.h
+++ b/Unreal/CarlaUE4/Plugins/Carla/Source/Carla/Walker/WalkerAIController.h
@@ -44,7 +44,7 @@ public:
   
 
   UFUNCTION(BlueprintCallable)
-  void SenseActors(const TArray<AActor *>& Actors);
+  void SenseActors(TArray<AActor *> Actors);
 
   EWalkerStatus GetWalkerStatus() const
   {