diff --git a/sotodlib/preprocess/preprocess_util.py b/sotodlib/preprocess/preprocess_util.py
index 47426fd27..c15298ddc 100644
--- a/sotodlib/preprocess/preprocess_util.py
+++ b/sotodlib/preprocess/preprocess_util.py
@@ -988,7 +988,7 @@ def check_cfg_match(ref, loaded, logger=None):
                 return False
             else:
                 if type(ref[ri]) is core.AxisManager:
-                    check_cfg_match(ref[ri], loaded[li])
+                    check_cfg_match(ref[ri], loaded[li], logger)
                 elif ref[ri] == loaded[li]:
                     continue
                 else: