diff --git a/python/lsst/ts/tunablelaser/config_schema.py b/python/lsst/ts/tunablelaser/config_schema.py
index 22019c5..2f1396d 100644
--- a/python/lsst/ts/tunablelaser/config_schema.py
+++ b/python/lsst/ts/tunablelaser/config_schema.py
@@ -23,8 +23,10 @@
 
 import yaml
 
+from .enums import OpticalConfiguration
+
 CONFIG_SCHEMA = yaml.safe_load(
-    """
+    f"""
 $schema: http://json-schema.org/draft-07/schema#
 $id: https://github.com/lsst-ts/ts_TunableLaser/blob/master/schema/TunableLaser.yaml
 title: TunableLaser v4