diff --git a/peppy/simple_attr_map.py b/peppy/simple_attr_map.py
index 9da52c2d..f47b3aee 100644
--- a/peppy/simple_attr_map.py
+++ b/peppy/simple_attr_map.py
@@ -41,4 +41,7 @@ def __setattr__(self, item, value):
         self._mapped_attr[item] = value
 
     def __getattr__(self, item):
-        return self._mapped_attr[item]
+        try:
+            return self._mapped_attr[item]
+        except KeyError:
+            return None