diff --git a/src/dexorder/final_ohlc.py b/src/dexorder/final_ohlc.py
index 439a3a0..f735c4d 100644
--- a/src/dexorder/final_ohlc.py
+++ b/src/dexorder/final_ohlc.py
@@ -287,10 +287,11 @@ class OHLCFileSeries:
                 os.makedirs(os.path.dirname(quote_filename), exist_ok=True)
                 self.quote_file = open(quote_filename, 'bw')
                 line = None
-            try:
-                start, old_time, old_price = line.split(',')
-            except ValueError:
-                line = None
+            if line:
+                try:
+                    start, old_time, old_price = line.split(',')
+                except ValueError:
+                    line = None
             if line:
                 # noinspection PyUnboundLocalVariable
                 self.series_start = from_timestamp(int(start))