diff --git a/src/libslic3r/GCode.cpp b/src/libslic3r/GCode.cpp
index da117e178..4a9c73bde 100644
--- a/src/libslic3r/GCode.cpp
+++ b/src/libslic3r/GCode.cpp
@@ -1991,6 +1991,18 @@ void GCode::_do_export(Print& print, GCodeOutputStream &file, ThumbnailsGenerato
         file.writeln(max_height_z_tip.str());
     }
 
+    {
+        auto used_filaments = print.get_slice_used_filaments(false);
+        std::ostringstream out;
+        out << "; filament: ";
+        for (size_t idx = 0; idx < used_filaments.size(); ++idx) {
+            if (idx != 0)
+                out << ',';
+            out << used_filaments[idx] + 1;
+        }
+        file.writeln(out.str());
+    }
+
     file.write_format("; HEADER_BLOCK_END\n\n");
 
     //BBS: write global config at the beginning of gcode file because printer need these config information