diff --git a/sotodlib/preprocess/processes.py b/sotodlib/preprocess/processes.py
index c1d0e7c6b..7d402fd97 100644
--- a/sotodlib/preprocess/processes.py
+++ b/sotodlib/preprocess/processes.py
@@ -3015,13 +3015,13 @@ def calc_and_save(self, aman, proc_aman):
         return aman, proc_aman
 
     def save(self, proc_aman, calc_aman, name): 
-        if self.save_cfgs is None:
+        if not self.save_cfgs:
             return
         if self.save_cfgs:
             proc_aman.wrap(name, calc_aman)
 
     def select(self, meta, proc_aman=None, in_place=True):
-        if self.select_cfgs is None:
+        if not self.select_cfgs:
             return meta
         if proc_aman is None:
             proc_aman = meta.preprocess