HAProxy - node check - L7STS VS L7RSP

Hi,
I have 2 HAProxy nodes installed with 2 different versions. 1.5 and 2.2.
It looks like the default check in 1.5 is L7STS vs L7RSP in version 2.2.
Because of that difference, only the 1.5 version shows health nodes.

Is it possible to force L7STS on version 2.2?

My configuration:
global
log 127.0.0.1:514 local0
maxconn 500

defaults
log global
mode tcp
retries 2
timeout client 30m
timeout connect 4s
timeout server 30m
timeout check 5s

listen stats
mode http
bind *:7000
stats enable
stats uri /

frontend master_postgresql
bind *:5000
acl is_write method POST UPDATE DELETE
use_backend backend_master if is_write
default_backend backend_master

frontend replicas_postgresql
bind *:5000
acl is_read method GET
use_backend backend_replicas if is_read
default_backend backend_replicas

backend backend_master
option httpchk OPTIONS /master
server pg01 pg01:5432 check port 8008
server pg02 pg02:5432 check port 8008

backend backend_replicas
option httpchk OPTIONS /replica
server pg01 pg01:5432 check port 8008
server pg02 pg02:5432 check port 8008