diff --git a/oml/utils.py b/oml/utils.py
index fad7535..aab530a 100644
--- a/oml/utils.py
+++ b/oml/utils.py
@@ -369,8 +369,7 @@ def open_folder(folder=None, path=None):
         cmd += ['xdg-open', folder]
     elif sys.platform == 'win32':
         path = '\\'.join(path.split('/'))
-        os.system('explorer.exe /select,"%s"' % path)
-        cmd = []
+        cmd = 'explorer.exe /select,"%s"' % path
     else:
         logger.debug('unsupported platform %s', sys.platform)
     if cmd: