diff --git a/app/plugins/migration_runner.py b/app/plugins/migration_runner.py
index 400789f..390c878 100644
--- a/app/plugins/migration_runner.py
+++ b/app/plugins/migration_runner.py
@@ -475,7 +475,7 @@ class MigrationRunner:
         pattern = r'CREATE\s+TABLE\s+(?:IF\s+NOT\s+EXISTS\s+)?["\']?(\w+)["\']?'
         return re.findall(pattern, sql, re.IGNORECASE)
 
-    def _extract_global_table_names(sql: str) -> set[str]:
+    def _extract_global_table_names(self, sql: str) -> set[str]:
         """Extract table names marked as global in SQL comments.
 
         Looks for `-- GLOBAL TABLE: table_name` comments in the SQL.