diff --git a/src/diffpy/srxconfutils/config.py b/src/diffpy/srxconfutils/config.py
index 3b672de..d5742bf 100644
--- a/src/diffpy/srxconfutils/config.py
+++ b/src/diffpy/srxconfutils/config.py
@@ -499,7 +499,7 @@ def parseKwargs(self, **kwargs):
         '''
         if kwargs != {}:
             changedargs = []
-            for optname, optvalue in kwargs.iteritems():
+            for optname, optvalue in kwargs.items():
                 if optname in self._optdata:
                     setattr(self, optname, optvalue)
                     changedargs.append(optname)