diff --git a/ryu/ofproto/ofproto_v1_2_parser.py b/ryu/ofproto/ofproto_v1_2_parser.py
index 4b38341a..ef43b129 100644
--- a/ryu/ofproto/ofproto_v1_2_parser.py
+++ b/ryu/ofproto/ofproto_v1_2_parser.py
@@ -1464,7 +1464,7 @@ class OFPActionSetField(OFPAction):
 
     Example::
 
-        set_field = OFPActionSetField(eth_src="00:00:00:00:00")
+        set_field = OFPActionSetField(eth_src="00:00:00:00:00:00")
     """
     def __init__(self, field=None, **kwargs):
         # old api
diff --git a/ryu/ofproto/ofproto_v1_3_parser.py b/ryu/ofproto/ofproto_v1_3_parser.py
index c2b27545..204da9b3 100644
--- a/ryu/ofproto/ofproto_v1_3_parser.py
+++ b/ryu/ofproto/ofproto_v1_3_parser.py
@@ -3166,7 +3166,7 @@ class OFPActionSetField(OFPAction):
 
     Example::
 
-        set_field = OFPActionSetField(eth_src="00:00:00:00:00")
+        set_field = OFPActionSetField(eth_src="00:00:00:00:00:00")
     """
     def __init__(self, field=None, **kwargs):
         # old api
diff --git a/ryu/ofproto/ofproto_v1_4_parser.py b/ryu/ofproto/ofproto_v1_4_parser.py
index b7e6a527..b23ce855 100644
--- a/ryu/ofproto/ofproto_v1_4_parser.py
+++ b/ryu/ofproto/ofproto_v1_4_parser.py
@@ -5357,7 +5357,7 @@ class OFPActionSetField(OFPAction):
 
     Example::
 
-        set_field = OFPActionSetField(eth_src="00:00:00:00:00")
+        set_field = OFPActionSetField(eth_src="00:00:00:00:00:00")
     """
     def __init__(self, field=None, **kwargs):
         super(OFPActionSetField, self).__init__()