diff --git a/python/gui.py b/python/gui.py
index fcd4872b..c9e73ef8 100644
--- a/python/gui.py
+++ b/python/gui.py
@@ -8,7 +8,7 @@ def StartGUI():
     win.tk.eval('lappend ::auto_path ' + netgen._netgen_lib_dir)
     win.tk.eval('lappend ::auto_path ' + netgen._netgen_bin_dir)
     # load with absolute path to avoid issues on MacOS
-    win.tk.eval('load '+netgen._netgen_lib_dir.replace('\\','/')+'/libgui[info sharedlibextension] gui')
+    win.tk.eval('load "'+netgen._netgen_lib_dir.replace('\\','/')+'/libgui[info sharedlibextension]" gui')
     win.tk.eval( netgen.libngpy._meshing._ngscript)
 
 if not netgen.libngpy._meshing._netgen_executable_started: