enable/disabled http2

I have disabled http2 in my listener like this

listener Default {
address *:80
secure 0
enableSpdy 0
listener SSL {
address *:443
secure 1
enableSpdy 0

default listener work but in SSL listener does not disable the http2 I want to disable http2 all vhost which are using SSL listener
when I add enableSpdy 0 in all vhost then it works properly can you tell how I can enable /disable http2 using listener conf