diff --git a/docs/examples/parallel/pi/parallelpi.py b/docs/examples/parallel/pi/parallelpi.py
index 9a3b6b4..64bdf29 100644
--- a/docs/examples/parallel/pi/parallelpi.py
+++ b/docs/examples/parallel/pi/parallelpi.py
@@ -24,7 +24,7 @@ from timeit import default_timer as clock
 
 # Files with digits of pi (10m digits each)
 filestring = 'pi200m.ascii.%(i)02dof20'
-files = [filestring % {'i':i} for i in range(1,16)]
+files = [filestring % {'i':i} for i in range(1,21)]
 
 # Connect to the IPython cluster
 c = Client()