diff --git a/usersguide/processing.html b/usersguide/processing.html
index cadd2a23cb..2aa84bb42b 100644
--- a/usersguide/processing.html
+++ b/usersguide/processing.html
@@ -309,7 +309,7 @@ data has been extracted as was done in the 2D plotting example script above, a
 SILO file can be created with:</p>
 <div class="highlight-python"><pre>import silomesh as sm
 sm.init_silo("fluxtally.silo")
-sm.init_mesh('tally_mesh',*mesh.dimension, *mesh.lower_left, *mesh.width)
+sm.init_mesh('tally_mesh',*mesh.dimension, *mesh.lower_left, *mesh.upper_right)
 sm.init_var('flux_tally_thermal')
 for x in range(1,nx+1):
   for y in range(1,ny+1):