diff --git a/iqfeed/iqfeed.py b/iqfeed/iqfeed.py
index 1caff0a..e39fe93 100644
--- a/iqfeed/iqfeed.py
+++ b/iqfeed/iqfeed.py
@@ -95,11 +95,9 @@ def get_historical_data(symbol: str, interval: int, date: datetime = None,
     data = StringIO(data)
     data = pd.read_csv(data, index_col = False, 
         names=['Date', 'High', 'Low', 'Open', 'Close', 'Total Volume', 'Period Volume'])
-    if data.empty:
-        return data
-
-    data['Date'] = pd.to_datetime(data['Date'])
-    data['Date'] = data['Date'].dt.date
+    if not data.empty:
+        data['Date'] = pd.to_datetime(data['Date'])
+        data['Date'] = data['Date'].dt.date
     return data
 
 if __name__ == '__main__':