diff --git a/source/Control_Flow_Statements.rst b/source/Control_Flow_Statements.rst
index d947efc32339a36e581dfda79343aa6f9726bc6a..1e29fda04909e170f6534977ef56f2b76e77b387 100644
--- a/source/Control_Flow_Statements.rst
+++ b/source/Control_Flow_Statements.rst
@@ -214,7 +214,7 @@ and the 2 dna fragments: ::
 Bonus
 ^^^^^
 
-If you prefer the enzyme implemeted as namedtuple
+If you prefer the enzyme implemented as namedtuple:
 
 :download:`restriction_namedtuple.py <_static/code/restriction_namedtuple.py>` .