diff --git a/backtesting/backtesting.py b/backtesting/backtesting.py
index 95b0f16f..6a94e41f 100644
--- a/backtesting/backtesting.py
+++ b/backtesting/backtesting.py
@@ -958,7 +958,7 @@ def __init__(self,
 
         `cash` is the initial cash to start with.
 
-        `commission` is the commision ratio. E.g. if your broker's commission
+        `commission` is the commission ratio. E.g. if your broker's commission
         is 1% of trade value, set commission to `0.01`. Note, if you wish to
         account for bid-ask spread, you cam approximate doing so by increasing
         the commission, e.g. set it to `0.0002` for commission-less forex