diff --git a/gui/gui.py b/gui/gui.py
index 2080ca3..a90d22a 100644
--- a/gui/gui.py
+++ b/gui/gui.py
@@ -141,10 +141,7 @@ class Gui:
                                 values["-JAVA FOLDER-"],
                             )
                             output_path = values['-OUTPUT FOLDER-']
-                            if font_filepath is not None:
-                                nassi(file_path, output_path, gui=self, font_filepath=font_filepath)
-                            else:
-                                nassi(file_path, output_path, gui=self)
+                            nassi(file_path, output_path, gui=self, font_filepath=str(font_filepath))
 
                             fnames = output(values)
                             window['-OUTPUT FILE LIST-'].update(fnames)