diff --git a/Engine.Core/ActiveBehaviourCollectorSorted.cs b/Engine.Core/ActiveBehaviourCollectorSorted.cs
index e6807c2..4918c2a 100644
--- a/Engine.Core/ActiveBehaviourCollectorSorted.cs
+++ b/Engine.Core/ActiveBehaviourCollectorSorted.cs
@@ -6,7 +6,18 @@ namespace Syntriax.Engine.Core;
 
 public class ActiveBehaviourCollectorSorted<T> : ActiveBehaviourCollector<T> where T : class, IBehaviour
 {
-    public Comparison<T>? SortBy { get; set; } = null;
+    private Comparison<T>? _sortBy = null;
+    public Comparison<T>? SortBy
+    {
+        get => _sortBy;
+        set
+        {
+            _sortBy = value;
+
+            if (value is not null)
+                activeBehaviours.Sort(value);
+        }
+    }
 
     protected override void OnBehaviourAdd(IBehaviour behaviour)
     {
@@ -15,5 +26,5 @@ public class ActiveBehaviourCollectorSorted<T> : ActiveBehaviourCollector<T> whe
     }
 
     public ActiveBehaviourCollectorSorted() { }
-    public ActiveBehaviourCollectorSorted(IGameManager gameManager) : base(gameManager) { }
+    public ActiveBehaviourCollectorSorted(IGameManager gameManager, Comparison<T> sortBy) : base(gameManager) => SortBy = sortBy;
 }
diff --git a/Engine.Core/BehaviourCollectorSorted.cs b/Engine.Core/BehaviourCollectorSorted.cs
index 2c384eb..e96ab95 100644
--- a/Engine.Core/BehaviourCollectorSorted.cs
+++ b/Engine.Core/BehaviourCollectorSorted.cs
@@ -6,7 +6,18 @@ namespace Syntriax.Engine.Core;
 
 public class BehaviourCollectorSorted<T> : BehaviourCollector<T> where T : class
 {
-    public Comparison<T>? SortBy { get; set; } = null;
+    private Comparison<T>? _sortBy = null;
+    public Comparison<T>? SortBy
+    {
+        get => _sortBy;
+        set
+        {
+            _sortBy = value;
+
+            if (value is not null)
+                behaviours.Sort(value);
+        }
+    }
 
     protected override void OnBehaviourAdd(IBehaviour behaviour)
     {
@@ -15,5 +26,5 @@ public class BehaviourCollectorSorted<T> : BehaviourCollector<T> where T : class
     }
 
     public BehaviourCollectorSorted() { }
-    public BehaviourCollectorSorted(IGameManager gameManager) : base(gameManager) { }
+    public BehaviourCollectorSorted(IGameManager gameManager, Comparison<T> sortBy) : base(gameManager) => SortBy = sortBy;
 }