diff --git a/src/hub/dataload/sources/chembl/upload.py b/src/hub/dataload/sources/chembl/upload.py
index 0ecbbc0..7f1df7d 100644
--- a/src/hub/dataload/sources/chembl/upload.py
+++ b/src/hub/dataload/sources/chembl/upload.py
@@ -28,7 +28,7 @@ def load_data(self, data_folder):
         )
         # for doc in load_data(target_filepaths):
         #     yield doc
-        return self.keylookup(load_data(target_filepaths))
+        return self.keylookup(load_data)(target_filepaths)
 
     @classmethod
     def get_mapping(klass):