diff --git a/OpenRA.Game/GameRules/WeaponInfo.cs b/OpenRA.Game/GameRules/WeaponInfo.cs
index 6f8b9c0599..d5fef32eec 100644
--- a/OpenRA.Game/GameRules/WeaponInfo.cs
+++ b/OpenRA.Game/GameRules/WeaponInfo.cs
@@ -220,6 +220,9 @@ namespace OpenRA.GameRules
 		/// <summary>Checks if the weapon is valid against (can target) the frozen actor.</summary>
 		public bool IsValidAgainst(FrozenActor victim, Actor firedBy)
 		{
+			if (!victim.IsValid)
+				return false;
+
 			if (!CanTargetSelf && victim.Actor == firedBy)
 				return false;