diff --git a/doc/tutorial/source/introduction.rst b/doc/tutorial/source/introduction.rst
index 4929cf38c..93e70d800 100644
--- a/doc/tutorial/source/introduction.rst
+++ b/doc/tutorial/source/introduction.rst
@@ -34,7 +34,7 @@ A few key points are worth noting at the onset:
 
  
 For |ns2| Users
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 For those familiar with |ns2|, the most visible outward change when moving to 
 |ns3| is the choice of scripting language.  Programs in |ns2| are