diff --git a/webif/lib/auto/util.jim b/webif/lib/auto/util.jim
index 82754d6..30681d2 100644
--- a/webif/lib/auto/util.jim
+++ b/webif/lib/auto/util.jim
@@ -5,12 +5,13 @@ set ::auto::logprefix ""
 set ::auto::loglevel 1
 
 proc ::auto::loginit {} {
-
+	variable settings
+	set logsize [$settings logsize]
 	# Rotate log file if large enough.
 	if {[file exists $::auto::logfile] &&
-	    [file size $::auto::logfile] > 2097152} {
-		file copy -force $::auto::logfile "/mod/tmp/auto_old.log"
-		file delete $::auto::logfile
+	    [file size $::auto::logfile] > $logsize} {
+		set tstamp [clock format [clock seconds] -format {%Y%m%d%H%M%S}]
+		file rename -force $::auto::logfile "/mod/tmp/auto.$tstamp.log"
 	}
 
 	# Open log file