diff --git a/core/src/com/unciv/models/ruleset/Building.kt b/core/src/com/unciv/models/ruleset/Building.kt
index 6a10f19fa1..0ffb7b4612 100644
--- a/core/src/com/unciv/models/ruleset/Building.kt
+++ b/core/src/com/unciv/models/ruleset/Building.kt
@@ -666,7 +666,7 @@ class Building : RulesetStatsObject(), INonPerpetualConstruction {
         }
         val cannotBeBuiltWithUnique = uniqueObjects
             .firstOrNull { it.isOfType(UniqueType.CannotBeBuiltWith) }
-        if (cannotBeBuiltWithUnique != null && cityConstructions.isBuilt(cannotBeBuiltWithUnique.params[0]))
+        if (cannotBeBuiltWithUnique != null && cityConstructions.containsBuildingOrEquivalent(cannotBeBuiltWithUnique.params[0]))
             rejectionReasons.add(RejectionReason.CannotBeBuiltWith.apply { errorMessage = cannotBeBuiltWithUnique.text })
 
         for ((resource, amount) in getResourceRequirements())