diff --git a/core/src/com/unciv/logic/automation/NextTurnAutomation.kt b/core/src/com/unciv/logic/automation/NextTurnAutomation.kt
index df349e1f44..227b385365 100644
--- a/core/src/com/unciv/logic/automation/NextTurnAutomation.kt
+++ b/core/src/com/unciv/logic/automation/NextTurnAutomation.kt
@@ -319,7 +319,8 @@ class NextTurnAutomation{
 
         val canSignResearchAgreementCiv = civInfo.getKnownCivs()
                 .asSequence()
-                .filter { civInfo.canSignResearchAgreementsWith(it) }
+                .filter { civInfo.canSignResearchAgreementsWith(it)
+                        && !civInfo.getDiplomacyManager(it).hasFlag(DiplomacyFlags.DeclinedResearchAgreement) }
                 .sortedByDescending { it.statsForNextTurn.science }
 
         val duration = when(civInfo.gameInfo.gameParameters.gameSpeed) {
diff --git a/core/src/com/unciv/logic/civilization/diplomacy/DiplomacyManager.kt b/core/src/com/unciv/logic/civilization/diplomacy/DiplomacyManager.kt
index bb4f8166de..75aae119c8 100644
--- a/core/src/com/unciv/logic/civilization/diplomacy/DiplomacyManager.kt
+++ b/core/src/com/unciv/logic/civilization/diplomacy/DiplomacyManager.kt
@@ -23,6 +23,7 @@ enum class RelationshipLevel{
 enum class DiplomacyFlags{
     DeclinedLuxExchange,
     DeclinedPeace,
+    DeclinedResearchAgreement,
     DeclaredWar,
     DeclarationOfFriendship,
     ResearchAgreement,
diff --git a/core/src/com/unciv/ui/worldscreen/TradePopup.kt b/core/src/com/unciv/ui/worldscreen/TradePopup.kt
index 0513263b9e..8fc2f500b4 100644
--- a/core/src/com/unciv/ui/worldscreen/TradePopup.kt
+++ b/core/src/com/unciv/ui/worldscreen/TradePopup.kt
@@ -69,6 +69,8 @@ class TradePopup(worldScreen: WorldScreen): Popup(worldScreen){
             val diplomacyManager = requestingCiv.getDiplomacyManager(viewingCiv)
             if(trade.ourOffers.all { it.type==TradeType.Luxury_Resource } && trade.theirOffers.all { it.type==TradeType.Luxury_Resource })
                 diplomacyManager.setFlag(DiplomacyFlags.DeclinedLuxExchange,20) // offer again in 20 turns
+            if(trade.ourOffers.any { it.type==TradeType.Agreement && it.name==Constants.researchAgreement })
+                diplomacyManager.setFlag(DiplomacyFlags.DeclinedResearchAgreement,20) // offer again in 20 turns
 
             if(trade.ourOffers.any{ it.type==TradeType.Treaty && it.name== Constants.peaceTreaty })
                 diplomacyManager.setFlag(DiplomacyFlags.DeclinedPeace,5)