babystepping (no replies)

I tried to setup baby stepping on Marlin 1.1x and getting an error

SENDING:M290 Z0.05
echo:Unknown command: "M290 Z0.05"
SENDING:M290 Z-0.05
echo:Unknown command: "M290 Z-0.05"
'
Has marlin dropped support for baby stepping or is there something more I should be doing.