diff --git a/pylot/core/io/inputs.py b/pylot/core/io/inputs.py
index f49d9405..1bb1d2a8 100644
--- a/pylot/core/io/inputs.py
+++ b/pylot/core/io/inputs.py
@@ -107,7 +107,7 @@ class PylotParameter(object):
             yield key, value
 
     def hasParam(self, parameter):
-        if self.__parameter.has_key(parameter):
+        if parameter in self.__parameter.keys():
             return True
         return False