diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index 905849b8a..22ce86c9f 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -6503,9 +6503,9 @@ void Plater::export_stl_obj(bool extended, bool selection_only)
         }
     }
 
-    if (path.EndsWith(".stl"))
+    if (path.Lower().EndsWith(".stl"))
         Slic3r::store_stl(path_u8.c_str(), &mesh, true);
-    else if (path.EndsWith(".obj"))
+    else if (path.Lower().EndsWith(".obj"))
         Slic3r::store_obj(path_u8.c_str(), &mesh);
 //    p->statusbar()->set_status_text(format_wxstr(_L("STL file exported to %s"), path));
 }