diff --git a/src/yggdrasil/icmpv6.go b/src/yggdrasil/icmpv6.go
index a8d4e6de..a34fa213 100644
--- a/src/yggdrasil/icmpv6.go
+++ b/src/yggdrasil/icmpv6.go
@@ -180,7 +180,7 @@ func (i *icmpv6) parse_packet_tun(datain []byte, datamac *[]byte) ([]byte, error
 			copy(addr[:], ipv6Header.Src[:])
 			copy(target[:], datain[48:64])
 			copy(mac[:], (*datamac)[:])
-			// i.tun.core.log.Println("Learning peer MAC", mac, "for", target)
+			i.tun.core.log.Printf("Learning peer MAC %x for %x\n", mac, target)
 			neighbor := i.peermacs[target]
 			neighbor.mac = mac
 			neighbor.learned = true