diff --git a/core/src/com/unciv/logic/city/CityConstructions.kt b/core/src/com/unciv/logic/city/CityConstructions.kt
index 5fcf4467..25fc6ae3 100644
--- a/core/src/com/unciv/logic/city/CityConstructions.kt
+++ b/core/src/com/unciv/logic/city/CityConstructions.kt
@@ -124,7 +124,8 @@ class CityConstructions {
 
     fun turnsToConstruction(constructionName: String): Int {
         val workLeft = getRemainingWork(constructionName)
-
+        if(workLeft < 0) // we've done more work than actually necessary - possible if circumstances cause buildings to be cheaper later
+            return 1 // we'll finish this next turn
 
         val currConstruction = currentConstruction