diff --git a/straxen/contexts.py b/straxen/contexts.py
index 3ef9a46c7..b2ae19482 100644
--- a/straxen/contexts.py
+++ b/straxen/contexts.py
@@ -29,7 +29,7 @@
     check_available=('raw_records', 'peak_basics'),
     store_run_fields=(
         'name', 'number',
-        'start', 'end', 'livetime', 'mode'))
+        'start', 'end', 'livetime', 'mode', 'source'))
 
 xnt_common_config = dict(
     n_tpc_pmts=straxen.n_tpc_pmts,