diff --git a/src/slic3r/GUI/Plater.hpp b/src/slic3r/GUI/Plater.hpp
index 822988c7f..697ea13e9 100644
--- a/src/slic3r/GUI/Plater.hpp
+++ b/src/slic3r/GUI/Plater.hpp
@@ -273,7 +273,7 @@ public:
     void calib_VFA(const Calib_Params &params);
 
     //BBS: add only gcode mode
-    bool is_gcode_3mf() { return m_only_gcode && m_exported_file; }
+    bool is_gcode_3mf() { return m_exported_file; }
     bool only_gcode_mode() { return m_only_gcode; }
     void set_only_gcode(bool only_gcode) { m_only_gcode = only_gcode; }
 
@@ -778,7 +778,7 @@ private:
 
     wxString m_last_loaded_gcode;
     //BBS: add only gcode mode
-    bool m_only_gcode { false };
+    bool m_only_gcode { false };//just for .gcode file not for .gcode.3mf
     bool m_exported_file { false };
     bool skip_thumbnail_invalid { false };
     bool m_loading_project {false };