diff --git a/kernel/audit.c b/kernel/audit.c
index 27ffcf3..d321e25 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -625,7 +625,9 @@
 	unsigned int ret;
 
 	spin_lock_irqsave(&serial_lock, flags);
-	ret = serial++;
+	do {
+		ret = ++serial;
+	} while (unlikely(!ret));
 	spin_unlock_irqrestore(&serial_lock, flags);
 
 	return ret;