diff --git a/src/libslic3r/GCode.cpp b/src/libslic3r/GCode.cpp
index 9534b968d0..674073fae3 100644
--- a/src/libslic3r/GCode.cpp
+++ b/src/libslic3r/GCode.cpp
@@ -2666,8 +2666,18 @@ void GCode::_do_export(Print& print, GCodeOutputStream &file, ThumbnailsGenerato
     //BBS: gcode writer doesn't know where the real position of extruder is after inserting custom gcode
     m_writer.set_current_position_clear(false);
     m_start_gcode_filament = GCodeProcessor::get_gcode_last_filament(machine_start_gcode);
-    // mark the first filament used in print
-    file.write_format(";VT%d\n",initial_extruder_id);
+
+    m_writer.init_extruder(initial_non_support_extruder_id);
+    // add the missing filament start gcode in machine start gcode
+    {
+        DynamicConfig config;
+        config.set_key_value("filament_extruder_id", new ConfigOptionInt((int)(initial_non_support_extruder_id)));
+        config.set_key_value("layer_num", new ConfigOptionInt(m_layer_index));
+        std::string filament_start_gcode = this->placeholder_parser_process("filament_start_gcode", print.config().filament_start_gcode.values.at(initial_non_support_extruder_id), initial_non_support_extruder_id);
+        file.writeln(filament_start_gcode);
+        // mark the first filament used in print
+        file.write_format(";VT%d\n", initial_extruder_id);
+    }
 
     //flush FanMover buffer to avoid modifying the start gcode if it's manual.
     if (!machine_start_gcode.empty() && this->m_fan_mover.get() != nullptr)