diff --git a/ffmap/config.py b/ffmap/config.py
index e2606b2..643bf0a 100644
--- a/ffmap/config.py
+++ b/ffmap/config.py
@@ -8,6 +8,7 @@ CONFIG = {
 	"orphan_threshold_days": 7,			# Router switches to orphaned state after X days
 	"delete_threshold_days": 180,		# Router is deleted after X days
 	"router_stat_days": 30,				# Router stats are collected for X days (if online)
+	"router_stat_netif": 21,			# Router stats for netifs are collected for X days (if online)
 	"router_stat_mindiff_secs": 10,		# Time difference (uptime) in seconds required for a new entry in router stats
 	"router_stat_mindiff_default": 270,	# Time difference (router stats tables) in seconds required for a new entry in router stats
 	"router_stat_mindiff_netif": 570,	# Time difference (router netif stats) in seconds required for a new entry in router stats
diff --git a/ffmap/routertools.py b/ffmap/routertools.py
index 5bae737..ae03011 100644
--- a/ffmap/routertools.py
+++ b/ffmap/routertools.py
@@ -387,6 +387,7 @@ def delete_unlinked_routers(mysql):
 
 def delete_old_stats(mysql):
 	threshold=(utcnow() - datetime.timedelta(days=CONFIG["router_stat_days"])).timestamp()
+	threshold_netif=(utcnow() - datetime.timedelta(days=CONFIG["router_stat_netif"])).timestamp()
 	
 	start_time = time.time()
 	mysql.execute("""
@@ -427,7 +428,7 @@ def delete_old_stats(mysql):
 		LEFT JOIN router AS r ON s.router = r.id
 		SET s.deletebit = 1
 		WHERE s.time < %s AND (r.status = 'online' OR r.status IS NULL)
-	""",(threshold,))
+	""",(threshold_netif,))
 	mysql.commit()
 	writelog(CONFIG["debug_dir"] + "/deletetime.txt", "Update netif stats: %.3f seconds" % (time.time() - start_time))
 	print("--- Update netif stats: %.3f seconds ---" % (time.time() - start_time))