diff --git a/RPLCD/i2c.py b/RPLCD/i2c.py
index 6ff5de8..0c4a5bf 100644
--- a/RPLCD/i2c.py
+++ b/RPLCD/i2c.py
@@ -69,6 +69,7 @@ def __init__(self, i2c_expander, address, expander_params=None, port=1,
             Pin mapping::
 
             7  | 6  | 5  | 4  | 3  | 2  | 1  | 0
+            -- | -- | -- | -- | -- | -- | -- | --
             D7 | D6 | D5 | D4 | BL | EN | RW | RS
 
 
@@ -92,6 +93,7 @@ def __init__(self, i2c_expander, address, expander_params=None, port=1,
             Pin mapping::
 
             7  | 6  | 5  | 4  | 3  | 2 | 1  | 0
+            -- | -- | -- | -- | -- | - | -- | - 
             BL | D7 | D6 | D5 | D4 | E | RS | -