diff --git a/src/caosdb/configuration.py b/src/caosdb/configuration.py
index e35c08dac69916cec5b714a56351a9330bf58093..90abc91637968bb589304a7b7da9d3ebb33fdf8b 100644
--- a/src/caosdb/configuration.py
+++ b/src/caosdb/configuration.py
@@ -25,7 +25,7 @@
 import os
 import yaml
 try:
-    optional_jsonschema = None
+    optional_jsonschema_validate = None
     from jsonschema import validate as optional_jsonschema_validate
 except ImportError:
     pass