diff --git a/core/src/com/unciv/logic/city/CityConstructions.kt b/core/src/com/unciv/logic/city/CityConstructions.kt
index 7d0091a295..c9c8fcd2e3 100644
--- a/core/src/com/unciv/logic/city/CityConstructions.kt
+++ b/core/src/com/unciv/logic/city/CityConstructions.kt
@@ -442,7 +442,7 @@ class CityConstructions : IsPartOfGameInfoSerialization {
             }
         }
 
-        if (construction is Building){
+        if (construction is Building) {
             for (unique in cityInfo.civInfo.getTriggeredUniques(UniqueType.TriggerUponConstructingBuilding, StateForConditionals(cityInfo.civInfo, cityInfo)))
                 if (unique.conditionals.any {it.type == UniqueType.TriggerUponConstructingBuilding && construction.matchesFilter(it.params[0])})
                     UniqueTriggerActivation.triggerCivwideUnique(unique, cityInfo.civInfo, cityInfo)
diff --git a/core/src/com/unciv/logic/civilization/diplomacy/DiplomacyManager.kt b/core/src/com/unciv/logic/civilization/diplomacy/DiplomacyManager.kt
index 016f5fb4f9..d9b6588a31 100644
--- a/core/src/com/unciv/logic/civilization/diplomacy/DiplomacyManager.kt
+++ b/core/src/com/unciv/logic/civilization/diplomacy/DiplomacyManager.kt
@@ -828,6 +828,9 @@ class DiplomacyManager() : IsPartOfGameInfoSerialization {
                 NotificationCategory.Diplomacy, civInfo.civName, NotificationIcon.Diplomacy, otherCivName)
             thirdCiv.getDiplomacyManager(civInfo).setFriendshipBasedModifier()
         }
+
+        for (unique in civInfo.getTriggeredUniques(UniqueType.TriggerUponDeclaringFriendship))
+            UniqueTriggerActivation.triggerCivwideUnique(unique, civInfo)
     }
 
     private fun setFriendshipBasedModifier() {
diff --git a/core/src/com/unciv/models/ruleset/unique/UniqueType.kt b/core/src/com/unciv/models/ruleset/unique/UniqueType.kt
index aca32a2028..2d3c15f4ad 100644
--- a/core/src/com/unciv/models/ruleset/unique/UniqueType.kt
+++ b/core/src/com/unciv/models/ruleset/unique/UniqueType.kt
@@ -703,6 +703,7 @@ enum class UniqueType(val text: String, vararg targets: UniqueTarget, val flags:
     TriggerUponEnteringEra("upon entering the [era]", UniqueTarget.TriggerCondition),
     TriggerUponAdoptingPolicy("upon adopting [policy]", UniqueTarget.TriggerCondition),
     TriggerUponDeclaringWar("upon declaring war", UniqueTarget.TriggerCondition),
+    TriggerUponDeclaringFriendship("upon declaring friendship", UniqueTarget.TriggerCondition),
     TriggerUponEnteringGoldenAge("upon entering a Golden Age", UniqueTarget.TriggerCondition),
     TriggerUponConqueringCity("upon conquering a city", UniqueTarget.TriggerCondition),
     TriggerUponConstructingBuilding("upon constructing [buildingFilter]", UniqueTarget.TriggerCondition),