diff --git a/core/src/com/unciv/logic/automation/UnitAutomation.kt b/core/src/com/unciv/logic/automation/UnitAutomation.kt
index 07de925702..02ef49b8a7 100644
--- a/core/src/com/unciv/logic/automation/UnitAutomation.kt
+++ b/core/src/com/unciv/logic/automation/UnitAutomation.kt
@@ -121,7 +121,7 @@ class UnitAutomation{
 
         //only submarine and destroyer can attack submarine
         if (tileCombatant.isInvisible()
-                && (!unit.hasUnique("Can attack submarines") || unit.civInfo.viewableInvisibleUnitsTiles.map { it.position }.contains(tile.position))){
+                && (!unit.hasUnique("Can attack submarines") || !unit.civInfo.viewableInvisibleUnitsTiles.map { it.position }.contains(tile.position))){
             return false
         }
         return true