From 96057c6dcbbe9a12a7e852d0708d28a14df3c0ef Mon Sep 17 00:00:00 2001
From: Anton Keks <anton@codeborne.com>
Date: Mon, 15 Feb 2021 21:58:23 +0200
Subject: [PATCH] avoid NPE if mac is null

---
 src/net/azib/ipscan/fetchers/MACFetcher.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/net/azib/ipscan/fetchers/MACFetcher.java b/src/net/azib/ipscan/fetchers/MACFetcher.java
index 327912b5..5788b03d 100644
--- a/src/net/azib/ipscan/fetchers/MACFetcher.java
+++ b/src/net/azib/ipscan/fetchers/MACFetcher.java
@@ -39,7 +39,7 @@ public abstract class MACFetcher extends AbstractFetcher {
 	}
 
 	String replaceSeparator(String mac) {
-		return mac.replace(":", separator);
+		return mac != null ? mac.replace(":", separator) : null;
 	}
 
 	private static String addLeadingZeroes(String mac) {