diff --git a/mods/d2k/bits/scripts/campaign-global.lua b/mods/d2k/bits/scripts/campaign-global.lua
index 72e3d3c435..4967c28e51 100644
--- a/mods/d2k/bits/scripts/campaign-global.lua
+++ b/mods/d2k/bits/scripts/campaign-global.lua
@@ -122,6 +122,9 @@ end
 
 DefendActor = function(unit, defendingPlayer, defenderCount)
 	Trigger.OnDamaged(unit, function(self, attacker)
+		if unit.Owner ~= defendingPlayer then
+			return
+		end
 
 		-- Don't try to attack spiceblooms
 		if attacker and attacker.Type == "spicebloom" then