diff --git a/core/src/com/unciv/logic/map/TileInfo.kt b/core/src/com/unciv/logic/map/TileInfo.kt
index 1951fbb17e..b19b8fe188 100644
--- a/core/src/com/unciv/logic/map/TileInfo.kt
+++ b/core/src/com/unciv/logic/map/TileInfo.kt
@@ -663,6 +663,7 @@ open class TileInfo {
         }
     }
 
+    @delegate:Transient
     private val isAdjacentToRiverLazy by lazy { neighbors.any { isConnectedByRiver(it) } }
     fun isAdjacentToRiver() = isAdjacentToRiverLazy