diff --git a/internal/clip/polygon.go b/internal/clip/polygon.go
index 25de61d7..a2bebe4d 100644
--- a/internal/clip/polygon.go
+++ b/internal/clip/polygon.go
@@ -35,5 +35,5 @@ func clipPolygon(
 	if newPoly.Empty() {
 		return geojson.NewMultiPolygon(nil)
 	}
-	return polygon
+	return newPoly
 }