diff --git a/Source/Framework/Constants/CreatureConst.cs b/Source/Framework/Constants/CreatureConst.cs
index 52a41854d..6395923ff 100644
--- a/Source/Framework/Constants/CreatureConst.cs
+++ b/Source/Framework/Constants/CreatureConst.cs
@@ -63,7 +63,7 @@ namespace Framework.Constants
         Pvp = 0x1000,
         Silenced = 0x2000,
         CannotSwim = 0x4000,
-        Unk15 = 0x8000,
+        Swimming = 0x8000, // shows swim animation in water
         NonAttackable2 = 0x10000,
         Pacified = 0x20000,
         Stunned = 0x40000,
diff --git a/Source/Game/Entities/Unit/Unit.Movement.cs b/Source/Game/Entities/Unit/Unit.Movement.cs
index 6a29790bf..bc91bf97e 100644
--- a/Source/Game/Entities/Unit/Unit.Movement.cs
+++ b/Source/Game/Entities/Unit/Unit.Movement.cs
@@ -61,7 +61,7 @@ namespace Game.Entities
             if (IsPet() && HasUnitFlag(UnitFlags.PetInCombat))
                 return true;
 
-            return HasUnitFlag(UnitFlags.Rename | UnitFlags.Unk15);
+            return HasUnitFlag(UnitFlags.Rename | UnitFlags.Swimming);
         }
         public virtual bool IsInWater()
         {