proftpd error on build (mod_sql_postgres)

[abmhmd]

Whenever I emerge proftpd I get an error. This happened on 2 seperate boxes. Please help. Following is the tail of the error:

mod_sql_postgres.c:681: dereferencing pointer to incomplete type
mod_sql_postgres.c:681: warning: implicit declaration of function `PQclear'
mod_sql_postgres.c:681: dereferencing pointer to incomplete type
mod_sql_postgres.c:696: dereferencing pointer to incomplete type
mod_sql_postgres.c: In function `cmd_insert':
mod_sql_postgres.c:797: dereferencing pointer to incomplete type
mod_sql_postgres.c:797: dereferencing pointer to incomplete type
mod_sql_postgres.c:798: dereferencing pointer to incomplete type
mod_sql_postgres.c:798: `PGRES_COMMAND_OK' undeclared (first use in this function)
mod_sql_postgres.c:801: dereferencing pointer to incomplete type
mod_sql_postgres.c:801: dereferencing pointer to incomplete type
mod_sql_postgres.c:811: dereferencing pointer to incomplete type
mod_sql_postgres.c: In function `cmd_update':
mod_sql_postgres.c:901: dereferencing pointer to incomplete type
mod_sql_postgres.c:901: dereferencing pointer to incomplete type
mod_sql_postgres.c:902: dereferencing pointer to incomplete type
mod_sql_postgres.c:902: `PGRES_COMMAND_OK' undeclared (first use in this function)
mod_sql_postgres.c:905: dereferencing pointer to incomplete type
mod_sql_postgres.c:905: dereferencing pointer to incomplete type
mod_sql_postgres.c:915: dereferencing pointer to incomplete type
mod_sql_postgres.c: In function `cmd_query':
mod_sql_postgres.c:1022: dereferencing pointer to incomplete type
mod_sql_postgres.c:1022: dereferencing pointer to incomplete type
mod_sql_postgres.c:1023: dereferencing pointer to incomplete type
mod_sql_postgres.c:1023: `PGRES_TUPLES_OK' undeclared (first use in this function)
mod_sql_postgres.c:1024: dereferencing pointer to incomplete type
mod_sql_postgres.c:1024: `PGRES_COMMAND_OK' undeclared (first use in this function)
mod_sql_postgres.c:1027: dereferencing pointer to incomplete type
mod_sql_postgres.c:1027: dereferencing pointer to incomplete type
mod_sql_postgres.c:1041: dereferencing pointer to incomplete type
mod_sql_postgres.c:1044: dereferencing pointer to incomplete type
make[1]: *** [mod_sql_postgres.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: Leaving directory `/var/tmp/portage/proftpd-1.2.5-r1/work/proftpd-1.2.5/modules'
make: *** [modules] Error 2

!!! ERROR: The ebuild did not complete successfully.
!!! Function src_compile, Line 6, Exitcode 2
!!! compile problem

!!! emerge aborting on /usr/portage/net-ftp/proftpd/proftpd-1.2.5-r1.ebuild .