diff --git a/helpers/postgresql.py b/helpers/postgresql.py
index 7c8f049f..c66b4344 100644
--- a/helpers/postgresql.py
+++ b/helpers/postgresql.py
@@ -147,7 +147,7 @@ class Postgresql:
         try:
             backup_size = backup_info['expanded_size_bytes']
             backup_start_segment = backup_info['wal_segment_backup_start']
-            backup_start_offset = backup_info('wal_segment_offset_backup_start')
+            backup_start_offset = backup_info['wal_segment_offset_backup_start']
         except Exception as e:
             logger.error("unable to get some of S3 backup parameters: {}".format(e))
             return False