diff --git a/core/src/com/unciv/ui/worldscreen/unit/UnitActions.kt b/core/src/com/unciv/ui/worldscreen/unit/UnitActions.kt
index f63cc60507..dac00bbfbf 100644
--- a/core/src/com/unciv/ui/worldscreen/unit/UnitActions.kt
+++ b/core/src/com/unciv/ui/worldscreen/unit/UnitActions.kt
@@ -91,9 +91,13 @@ class UnitActions {
         if(!unit.type.isCivilian() && tile.improvement !=null){
             actionList += UnitAction("Pillage", unit.currentMovement>0)
             {
-                tile.improvementInProgress = tile.improvement
-                tile.turnsToImprovement = 2
                 tile.improvement = null
+                // http://well-of-souls.com/civ/civ5_improvements.html says that naval improvements are destroyed upon pilllage
+                //    and I can't find any other sources so I'll go with that
+                if(tile.isLand()) {
+                    tile.improvementInProgress = tile.improvement
+                    tile.turnsToImprovement = 2
+                }
                 unit.useMovementPoints(1f)
                 unit.health = min(100,unit.health+25)
             }