diff --git a/boxmox/experiment.py b/boxmox/experiment.py
index 0763b4dff3e9e32560f8e0b14fd94d0dff5fb0aa..f90c5d562336382e4455a36f6236887264b96471 100644
--- a/boxmox/experiment.py
+++ b/boxmox/experiment.py
@@ -50,34 +50,34 @@ class Namelist:
 
     '''
     def __getitem__(self, item):
-        if item.lower() in self.__namelist['boxmox'].keys():
-            return self.__namelist['boxmox'][item.lower()]
+        if item.lower() in self._namelist['boxmox'].keys():
+            return self._namelist['boxmox'][item.lower()]
         else:
             raise Exception('{:s} does not exist in Namelist.'.format(item))
     def __setitem__(self, item, value):
-        if item.lower() in self.__namelist['boxmox'].keys():
+        if item.lower() in self._namelist['boxmox'].keys():
             try:
-                self.__namelist['boxmox'][item] = value
+                self._namelist['boxmox'][item] = value
             except:
                 raise Exception('Failed to set {:s} to {:s}'.format(item, str(value)))
         else:
             raise Exception('{:s} does not exist in Namelist'.format(item))
     def __str__(self):
-        return ', '.join( [ ('{:s}: {:s}'.format(item, str(self.__namelist['boxmox'][item]))) for item in self.__namelist['boxmox'].keys() ] )
+        return ', '.join( [ ('{:s}: {:s}'.format(item, str(self._namelist['boxmox'][item]))) for item in self._namelist['boxmox'].keys() ] )
     def keys(self):
-        return self.__namelist['boxmox'].keys()
+        return self._namelist['boxmox'].keys()
     def write(self, path):
         '''
         Write namelist to file.
         '''
-        self.__namelist.write(path, 'w')
+        self._namelist.write(path, 'w')
     def read(self, path):
         '''
         Read namelist from file.
         '''
-        self.__namelist = f90nml.read(path)
+        self._namelist = f90nml.read(path)
     def __init__(self, path = None):
-        self.__namelist = None
+        self._namelist = None
 
         firstExample = examples[examples.keys()[0]]
         self.read(os.path.join(firstExample.path, "BOXMOX.nml"))