Current branches mod_proxy link error

[Steffen Land]

Try to build   branches revision 1889914


mod_proxy.obj : error LNK2019: unresolved external symbol 
__imp__ap_ssl_conn_is_ssl@4 referenced in function 
_ap_proxy_conn_is_https@4
mod_proxy.obj : error LNK2019: unresolved external symbol 
__imp__ap_ssl_var_lookup@20 referenced in function 
_ap_proxy_ssl_val@20

Do I miss a (new) include ?

Steffen