diff --git a/fetchers.py b/fetchers.py
index cca6ed2..d8c2a2c 100644
--- a/fetchers.py
+++ b/fetchers.py
@@ -154,6 +154,9 @@ def getArp(ip_pool = None):
             if mac == "FF:FF:FF:FF:FF:FF".lower():
                 continue
 
+            if not mac:
+                continue
+
             mac = pretty_mac(mac)
 
             if mac not in firstMacLookup: