diff --git a/webif/lib/auto/scan b/webif/lib/auto/scan
index 05fea36..3926ad6 100755
--- a/webif/lib/auto/scan
+++ b/webif/lib/auto/scan
@@ -73,7 +73,10 @@ if {!$::auto::force} {
 
 	set timesincelast $(([clock seconds] - [$::auto::settings autolast]) \
 	    / 60)
-	if {$timesincelast < $autofreq} {
+	if {$timesincelast < 0} {
+		# time machine issue: correct it
+		$::auto::settings autolast 0
+	} elseif {$timesincelast < $autofreq} {
 		::auto::log "Aborting, not yet time to run." 2
 		::auto::log "  elapsed (minutes): $timesincelast (<$autofreq)" 2
 		exit