diff --git a/swh/indexer/storage/__init__.py b/swh/indexer/storage/__init__.py
--- a/swh/indexer/storage/__init__.py
+++ b/swh/indexer/storage/__init__.py
@@ -442,7 +442,7 @@
             yield converters.db_to_ctags(dict(zip(db.content_ctags_cols, obj)))
 
     @remote_api_endpoint('content/fossology_license')
-    @db_transaction_generator()
+    @db_transaction()
     def content_fossology_license_get(self, ids, db=None, cur=None):
         """Retrieve licenses per id.