diff --git a/interp/baker/__init__.py b/interp/baker/__init__.py
index 7c41dc8..e45f605 100644
--- a/interp/baker/__init__.py
+++ b/interp/baker/__init__.py
@@ -162,10 +162,10 @@ def run_baker(X, R, S, order=2):
   if order == 1:
     answer['qlin'] = qlin
     return answer
-  elif order in (2,3,4,5,6):
+  elif order in xrange(2,11):
     error_term, abc = get_error(phi, R, S, order)
   else:
-    raise Exception('unsupported order for baker method')
+    raise Exception('unsupported order "%d" for baker method' % order)
 
   q_final = qlin + error_term