ipv6 default gateway does not work

Goodday everyone.
I am trying to get ipv6 up and running on a mikrotik router.
i got from one provider as want address: 2a01:238:43a1:fe00:9700:3989:ce55:54da, as ipv6 subnet i got: 2a01:238:43a1:fe00::/56 and the fefault gateway should be fe80 ::1 should be.
setting one ipv6 wan address (2a01:238:43a1:fe00:9700:3989:ce55:54da) on ether1 succeeds
but when I try to add the default gateway with the command: “/ipv6 route add dst-address=::/0 gateway=fe80::1” I get the error: failure: Invalid route configuration: Interface must be specified for IPv6 link-local gateways

who can tell me what i’m doing wrong and how i can get the route correct??

/ipv6 route add dst-address=::/0 gateway=fe80::1%ether1

thank you very much.
it works fine now