diff --git a/cobra/examples/01_create_model.py b/cobra/examples/01_create_model.py
index <HASH>..<HASH> 100644
--- a/cobra/examples/01_create_model.py
+++ b/cobra/examples/01_create_model.py
@@ -15,7 +15,6 @@ reaction.name = '3 oxoacyl acyl carrier protein synthase n C140 '
 reaction.subsystem = 'Cell Envelope Biosynthesis'
 reaction.lower_bound = 0.  # This is the default
 reaction.upper_bound = 1000.  # This is the default
-reaction.reversibility = 0  # This is the default
 reaction.objective_coefficient = 0. # this is the default
 
 # Create the metabolites
diff --git a/cobra/examples/05_add_reactions.py b/cobra/examples/05_add_reactions.py
index <HASH>..<HASH> 100644
--- a/cobra/examples/05_add_reactions.py
+++ b/cobra/examples/05_add_reactions.py
@@ -19,7 +19,6 @@ reaction.name = '3 oxoacyl acyl carrier protein synthase n C140'
 reaction.subsystem = 'Cell Envelope Biosynthesis'
 reaction.lower_bound = 0.  # This is the default
 reaction.upper_bound = 1000.  # This is the default
-reaction.reversibility = 0  # This is the default
 reaction.objective_coefficient = 0.  # This is the default
 
 # Adding metabolites to a reaction requires using a dictionary of the
examples set reversibility

reversibility should not be set, but is calculated from upper and lower
bounds