diff --git a/SDK/include/NDK/World.hpp b/SDK/include/NDK/World.hpp
index 0f67eb7ef..29f860908 100644
--- a/SDK/include/NDK/World.hpp
+++ b/SDK/include/NDK/World.hpp
@@ -30,12 +30,12 @@ namespace Ndk
 
 			void Clear();
 
-			void KillEntity(EntityHandle entity);
+			void KillEntity(const EntityHandle& entity);
 			void KillEntities(const EntityList& list);
 
 			EntityHandle GetEntity(Entity::Id id);
 
-			bool IsEntityValid(EntityHandle entity) const;
+			bool IsEntityValid(const EntityHandle& entity) const;
 			bool IsEntityIdValid(Entity::Id id) const;
 
 			void Update();
diff --git a/SDK/include/NDK/World.inl b/SDK/include/NDK/World.inl
index fbffd2c40..0f275872a 100644
--- a/SDK/include/NDK/World.inl
+++ b/SDK/include/NDK/World.inl
@@ -22,7 +22,7 @@ namespace Ndk
 			KillEntity(entity);
 	}
 
-	inline bool World::IsEntityValid(EntityHandle entity) const
+	inline bool World::IsEntityValid(const EntityHandle& entity) const
 	{
 		return entity.IsValid() && entity->GetWorld() == this && IsEntityIdValid(entity->GetId());
 	}
diff --git a/SDK/src/NDK/World.cpp b/SDK/src/NDK/World.cpp
index 38ee525d0..14befe738 100644
--- a/SDK/src/NDK/World.cpp
+++ b/SDK/src/NDK/World.cpp
@@ -52,7 +52,7 @@ namespace Ndk
 		m_killedEntities.clear();
 	}
 
-	void World::KillEntity(EntityHandle entity)
+	void World::KillEntity(const EntityHandle& entity)
 	{
 		///DOC: Ignoré si l'entité est invalide
 
@@ -77,7 +77,7 @@ namespace Ndk
 		{
 			for (unsigned int i = 0; i < m_killedEntities.size(); ++i)
 			{
-				EntityHandle entity = m_killedEntities[i];
+				const EntityHandle& entity = m_killedEntities[i];
 
 				for (unsigned int j = 0; j < m_aliveEntities.size(); ++j)
 				{