diff --git a/Svelto.ECS.Components/Components/ExtensionMethodsUECS.cs b/Svelto.ECS.Components/Components/ExtensionMethodsUECS.cs
index 71f17a3..c0af29a 100644
--- a/Svelto.ECS.Components/Components/ExtensionMethodsUECS.cs
+++ b/Svelto.ECS.Components/Components/ExtensionMethodsUECS.cs
@@ -1,4 +1,6 @@
 #if UNITY_MATHEMATICS
+using System.Runtime.CompilerServices;
+using UnityEngine;
 using Svelto.ECS.Components;
 using Unity.Mathematics;