diff --git a/cmd/start.go b/cmd/start.go
index 15d7f68..f8c5fc5 100644
--- a/cmd/start.go
+++ b/cmd/start.go
@@ -1009,11 +1009,15 @@ func setupVnetInterfaceJailSide(jail *Jail, hostepairs []string) error {
 			}
 			// Fix mac flapping and instabilities with bridged vnet network
 			if gBridgeStaticMac {
-				log.Debugf("Set %s as static to %s in %s address cache\n")
-				cmd = fmt.Sprintf("/sbin/ifconfig %s static %s %s", bridge, nic, jsmac)
+				printablemac := hex.EncodeToString(jsmac)
+				for i := 2 ; i < len(printablemac) ; i += 3 {
+					printablemac = printablemac[:i] + ":" + printablemac[i:]
+				}
+				log.Debugf("Set %s.%d as static to %s in %s address cache\n", nic, jail.JID, printablemac, bridge)
+				cmd = fmt.Sprintf("/sbin/ifconfig %s static %s.%d %s", bridge, nic, jail.JID, printablemac)
 				out, err := executeCommand(cmd)
 				if err != nil {
-					return fmt.Errorf("Error adding member %s to %s: %v: %s\n", nic, bridge, err, out)
+					return fmt.Errorf("Error setting %s.%d static with %s on %s: %v: %s\n", nic, jail.JID, printablemac, bridge, err, out)
 				}
 			}
 		}