diff --git a/ols/config.py b/ols/config.py
index e2b27a2..0d36895 100644
--- a/ols/config.py
+++ b/ols/config.py
@@ -190,6 +190,17 @@ def get_config():
                   if b.get('type', '') in ('m8b',)):
         fix_datapath(wconf, 'datafile')
 
+    # Store updatable localdb files
+    localdb_files = []
+    for wconf in (b for b in conf.get('resolver', {}).values()
+                  if b.get('type', '') in ('localdb',)):
+        if wconf.get('update', False):
+            dbfile = wconf.get('db')
+            if dbfile is not None:
+                localdb_files.append(dbfile)
+
+    conf['localdb_files'] = localdb_files
+
     return conf