diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index e12f0c321c9..eb017db6958 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -9387,7 +9387,8 @@ void Plater::add_model(bool imperial_units, std::string fname)
     if (!load_files(paths, strategy, ask_multi).empty()) {
 
         if (get_project_name() == _L("Untitled") && paths.size() > 0) {
-            p->set_project_filename(wxString::FromUTF8(paths[0].string()));
+            boost::filesystem::path full_path(paths[0].string());
+            p->set_project_name(from_u8(full_path.stem().string()));
         }
 
         wxGetApp().mainframe->update_title();
@@ -10997,8 +10998,8 @@ void Plater::add_file()
         Plater::TakeSnapshot snapshot(this, snapshot_label);
         if (!load_files(paths, LoadStrategy::LoadModel, false).empty()) {
             if (get_project_name() == _L("Untitled") && paths.size() > 0) {
-                p->set_project_filename(wxString::FromUTF8(paths[0].string()));
-
+                boost::filesystem::path full_path(paths[0].string());
+                p->set_project_name(from_u8(full_path.stem().string()));
             }
             wxGetApp().mainframe->update_title();
         }
@@ -11018,7 +11019,8 @@ void Plater::add_file()
         Plater::TakeSnapshot snapshot(this, snapshot_label);
         if (!load_files(paths, LoadStrategy::LoadModel, true).empty()) {
             if (get_project_name() == _L("Untitled") && paths.size() > 0) {
-                p->set_project_filename(wxString::FromUTF8(paths[0].string()));
+                boost::filesystem::path full_path(paths[0].string());
+                p->set_project_name(from_u8(full_path.stem().string()));
             }
             wxGetApp().mainframe->update_title();
         }