diff --git a/python/plugins/processing/algs/qgis/scripts/Keep_n_biggest_parts.py b/python/plugins/processing/algs/qgis/scripts/Keep_n_biggest_parts.py
index 4ff0b1bd81e..c33388b5e8e 100644
--- a/python/plugins/processing/algs/qgis/scripts/Keep_n_biggest_parts.py
+++ b/python/plugins/processing/algs/qgis/scripts/Keep_n_biggest_parts.py
@@ -33,10 +33,10 @@ for n, feat in enumerate(processing.features(polyLayer)):
 			featres.setGeometry(geom)
 		else:
 			featres.setGeometry(geom)
-			geomres = [geoms[i].asPolygon() for i,a in geomarea[-1 * To_keep]]
+			geomres = [geoms[i].asPolygon() for i,a in geomarea[-1 * To_keep :]]
 			featres.setGeometry(QgsGeometry.fromMultiPolygon(geomres))
 		writer.addFeature(featres)
 	else:
 		writer.addFeature(feat)
 
-del writer
\ No newline at end of file
+del writer