diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst
index 250c842..14a7afd 100644
--- a/Doc/library/itertools.rst
+++ b/Doc/library/itertools.rst
@@ -760,7 +760,7 @@
 
 Note, many of the above recipes can be optimized by replacing global lookups
 with local variables defined as default values.  For example, the
-*dotproduct* recipe can be written as:
+*dotproduct* recipe can be written as::
 
    def dotproduct(vec1, vec2, sum=sum, imap=imap, mul=operator.mul):
        return sum(imap(mul, vec1, vec2))