diff --git a/mtda/storage/writer.py b/mtda/storage/writer.py
index da68d43f..223da936 100644
--- a/mtda/storage/writer.py
+++ b/mtda/storage/writer.py
@@ -139,7 +139,7 @@ def worker(self):
         self.mtda.debug(3, f"storage.writer.worker(): {str(result)}")
         return result
 
-    def write_raw(self, data, session=None):
+    def write_raw(self, data):
         self.mtda.debug(3, "storage.writer.write_raw()")
 
         result = None
@@ -152,7 +152,7 @@ def write_raw(self, data, session=None):
         self.mtda.debug(3, f"storage.writer.write_raw(): {str(result)}")
         return result
 
-    def write_gz(self, data, session=None):
+    def write_gz(self, data):
         self.mtda.debug(3, "storage.writer.write_gz()")
 
         # Create a zlib decompressor when called for the first time