diff --git a/docs/hyperopt.md b/docs/hyperopt.md
index 0d7b1cc32..5f4e60b4a 100644
--- a/docs/hyperopt.md
+++ b/docs/hyperopt.md
@@ -237,9 +237,9 @@ class MyAwesomeStrategy(IStrategy):
         dataframe['macdhist'] = macd['macdhist']
 
         bollinger = ta.BBANDS(dataframe, timeperiod=20, nbdevup=2.0, nbdevdn=2.0)
-        dataframe['bb_lowerband'] = boll['lowerband']
-        dataframe['bb_middleband'] = boll['middleband']
-        dataframe['bb_upperband'] = boll['upperband']
+        dataframe['bb_lowerband'] = bollinger['lowerband']
+        dataframe['bb_middleband'] = bollinger['middleband']
+        dataframe['bb_upperband'] = bollinger['upperband']
         return dataframe
 ```