diff --git a/shell/Emulator.py b/shell/Emulator.py
index 5e41b565..3b600827 100644
--- a/shell/Emulator.py
+++ b/shell/Emulator.py
@@ -45,7 +45,7 @@ class XephyrProcess(Process):
 class XnestProcess(Process):
 	def __init__(self):
 		self._display = get_display_number()
-		cmd = 'Xnest :%d -geometry 640x480' % (self._display) 
+		cmd = 'Xnest :%d -ac -geometry 640x480' % (self._display) 
 		Process.__init__(self, cmd)
 		
 	def get_name(self):