diff --git a/sdcm/utils/cdc/options.py b/sdcm/utils/cdc/options.py
index a57907f4c3..283e476f4b 100644
--- a/sdcm/utils/cdc/options.py
+++ b/sdcm/utils/cdc/options.py
@@ -11,7 +11,7 @@
 CDC_SETTINGS_NAMES_VALUES = {
     "enabled": [True, False],
     "delta": ["full", "keys"],
-    "preimage": ["full", "true", "false"],
+    "preimage": ["full", True, False],
     "postimage": [True, False],
     "ttl": "86400"
 }