diff --git a/freqtrade/persistence.py b/freqtrade/persistence.py
index c21b902bc..a169bc042 100644
--- a/freqtrade/persistence.py
+++ b/freqtrade/persistence.py
@@ -157,7 +157,7 @@ class Trade(_DECL_BASE):
 
     id = Column(Integer, primary_key=True)
     exchange = Column(String, nullable=False)
-    pair = Column(String, nullable=False,index=True)
+    pair = Column(String, nullable=False, index=True)
     is_open = Column(Boolean, nullable=False, default=True, index=True)
     fee_open = Column(Float, nullable=False, default=0.0)
     fee_close = Column(Float, nullable=False, default=0.0)