diff --git a/core/src/com/unciv/logic/battle/CityCombatant.kt b/core/src/com/unciv/logic/battle/CityCombatant.kt
index 62fe3db67f..84dc6fd9e6 100644
--- a/core/src/com/unciv/logic/battle/CityCombatant.kt
+++ b/core/src/com/unciv/logic/battle/CityCombatant.kt
@@ -24,7 +24,7 @@ class CityCombatant(val city: City) : ICombatant {
     override fun isDefeated(): Boolean = city.health == 1
     override fun isInvisible(to: Civilization): Boolean = false
     override fun canAttack(): Boolean = city.canBombard()
-    override fun matchesFilter(filter: String) = MultiFilter.multiFilter(filter, {it == "City" || it == "All" || city.civ.matchesFilter(it)})
+    override fun matchesFilter(filter: String) = MultiFilter.multiFilter(filter, {it == "City" || it == "All" || city.matchesFilter(it)})
     override fun getAttackSound() = UncivSound.Bombard
 
     override fun takeDamage(damage: Int) {
diff --git a/core/src/com/unciv/models/ruleset/unique/UniqueParameterType.kt b/core/src/com/unciv/models/ruleset/unique/UniqueParameterType.kt
index 7a92caa76c..c94c07fb1a 100644
--- a/core/src/com/unciv/models/ruleset/unique/UniqueParameterType.kt
+++ b/core/src/com/unciv/models/ruleset/unique/UniqueParameterType.kt
@@ -86,8 +86,9 @@ enum class UniqueParameterType(
             UniqueType.UniqueParameterErrorSeverity? = getErrorSeverityForFilter(parameterText, ruleset)
 
         override fun isKnownValue(parameterText: String, ruleset: Ruleset): Boolean {
-            if (parameterText == "City") return true // MapUnitFilter covers CivFilter
+            if (parameterText == "City") return true
             if (MapUnitFilter.isKnownValue(parameterText, ruleset)) return true
+            if (CityFilter.isKnownValue(parameterText, ruleset)) return true
             return false
         }
     },