diff --git a/freqtrade/strategy/interface.py b/freqtrade/strategy/interface.py
index 4eb73fb2e..dcf665a02 100644
--- a/freqtrade/strategy/interface.py
+++ b/freqtrade/strategy/interface.py
@@ -33,7 +33,6 @@ class IStrategy(ABC):
         Based on TA indicators, populates the buy signal for the given dataframe
         :param dataframe: DataFrame
         :return: DataFrame with buy column
-        :return:
         """
 
     @abstractmethod
@@ -41,5 +40,5 @@ class IStrategy(ABC):
         """
         Based on TA indicators, populates the sell signal for the given dataframe
         :param dataframe: DataFrame
-        :return: DataFrame with buy column
+        :return: DataFrame with sell column
         """
diff --git a/freqtrade/strategy/resolver.py b/freqtrade/strategy/resolver.py
index c5a7cd577..de38cf67a 100644
--- a/freqtrade/strategy/resolver.py
+++ b/freqtrade/strategy/resolver.py
@@ -27,8 +27,7 @@ class StrategyResolver(object):
     def __init__(self, config: Optional[Dict] = None) -> None:
         """
         Load the custom class from config parameter
-        :param config:
-        :return:
+        :param config: configuration dictionary or None
         """
         config = config or {}