diff --git a/IPython/core/magic.py b/IPython/core/magic.py
index 31ba558..00d3799 100644
--- a/IPython/core/magic.py
+++ b/IPython/core/magic.py
@@ -3244,7 +3244,7 @@ Defaulting color scheme to 'NoColor'"""
         we have already handled that.
         """
         from IPython.lib.inputhook import enable_gui
-        opts, arg = self.parse_options(parameter_s='')
+        opts, arg = self.parse_options(parameter_s, '')
         if arg=='': arg = None
         return enable_gui(arg)