diff --git a/routlin/maintenance.py b/routlin/maintenance.py
index 0a84d9b..26da037 100644
--- a/routlin/maintenance.py
+++ b/routlin/maintenance.py
@@ -578,7 +578,7 @@ def refresh_arp_cache(cfg):
                 continue
             used_match = re.search(r'used\s+(\d+)/', line)
             used_secs = int(used_match.group(1)) if used_match else 0
-            if used_secs > ARP_MAX_AGE_SECS:
+            if state != 'REACHABLE' and used_secs > ARP_MAX_AGE_SECS:
                 continue
             idx = parts.index('lladdr')
             mac = parts[idx + 1].lower()