diff --git a/Source/Game/Entities/Unit/Unit.Movement.cs b/Source/Game/Entities/Unit/Unit.Movement.cs
index 871aaa60c..23b4d3f16 100644
--- a/Source/Game/Entities/Unit/Unit.Movement.cs
+++ b/Source/Game/Entities/Unit/Unit.Movement.cs
@@ -841,7 +841,7 @@ namespace Game.Entities
         public void UpdateMountCapability()
         {
             var mounts = GetAuraEffectsByType(AuraType.Mounted);
-            foreach (AuraEffect aurEff in mounts)
+            foreach (AuraEffect aurEff in mounts.ToArray())
             {
                 aurEff.RecalculateAmount();
                 if (aurEff.GetAmount() == 0)