Possible to decrypt aes256-sha1 ESP packets with secret?

[David Dean via Wireshark-users <wireshark-users () wireshark org>]

Hi,
I have a packet capture from a site-to-site VPN that I need to decode.
Here are the encryption options:
    authby=secret    keyexchange=ike    ike=aes256-sha1;modp1024    phase2=esp    phase2alg=aes256-sha1;modp1024    
pfs=no
The client has provided me with the shared secret.
I've tried adding the ESP SAs, but I can't see aes256-sha1 listed in the algorithms.
I'm using Wireshark v3.2.1 with Gcrypt 1.8.3.
Is it not possible to decode aes256-sha1 with Wireshark?
If it is possible, what options should I be choosing in the ESP SA window?
Thanks,
Dave

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