diff --git a/tap.go b/tap.go
index 5e1307c..afdcdb7 100644
--- a/tap.go
+++ b/tap.go
@@ -160,7 +160,7 @@ func (nc *NetCard) runRead() {
 				log.Fatal(err)
 			}
 
-			log.Printf("%v %v", net.IP(rframe.Source()).String(), rframe.Destination())
+			log.Printf("%v %v", net.IP(rframe.Source()).To4().String(), net.IP(rframe.Destination()).To4())
 
 			if rframe.Ethertype() != ethernet.IPv4 {
 				continue