diff --git a/src/libslic3r/Arrange.hpp b/src/libslic3r/Arrange.hpp
index d1f905b89b..4fd62ad22d 100644
--- a/src/libslic3r/Arrange.hpp
+++ b/src/libslic3r/Arrange.hpp
@@ -57,7 +57,7 @@ struct ArrangePolygon {
     //BBS: add row/col for sudoku-style layout
     int       row{0};
     int       col{0};
-    std::vector<int>  extrude_ids{1};        ///extruder_id for least extruder switch
+    std::vector<int> extrude_ids{};      /// extruder_id for least extruder switch
     int       bed_temp{0};         ///bed temperature for different material judge
     int       print_temp{0};      ///print temperature for different material judge
     int       first_bed_temp{ 0 };      ///first layer bed temperature for different material judge