diff --git a/warcprox/writer.py b/warcprox/writer.py
index 56ff635..3fd6c7d 100644
--- a/warcprox/writer.py
+++ b/warcprox/writer.py
@@ -158,7 +158,6 @@ class WarcWriter:
 
         with self._lock:
             writer = self._writer()
-            recordset_offset = writer.tell()
 
             for record in records:
                 offset = writer.tell()