undefined reference to `SSL_CTX_set_client_cert_cb'

Hello list,

I'm trying to compile postgresql-8.2.3 on a system running debian stable
with kernel 2.6.8-2-686, but compilation stops with this error:

<snip>
gcc -O2 -Wall -Wmissing-prototypes -Wpointer-arith -Winline
-Wendif-labels -fno-strict-aliasing initdb.o  -L../../../src/port
-lpgport -L../../../src/interfaces/libpq -lpq -L../../../src/port
-Wl,-rpath,'/usr/local/pgsql-8.2.3/lib' -lpgport -lpam -lssl -lcrypto
-lkrb5 -lz -lreadline -lcrypt -ldl -lm  -o initdb
../../../src/interfaces/libpq/libpq.so: undefined reference to
`SSL_CTX_set_client_cert_cb'
collect2: ld returned 1 exit status
make[3]: *** [initdb] Error 1
make[3]: Leaving directory `/usr/local/src/postgresql-8.2.3/src/bin/initdb'
make[2]: *** [install] Error 2
make[2]: Leaving directory `/usr/local/src/postgresql-8.2.3/src/bin'
make[1]: *** [install] Error 2
make[1]: Leaving directory `/usr/local/src/postgresql-8.2.3/src'
</snip>

Of course the debian packages libssl-dev, libssl0.9.6, libssl0.9.7 and
openssl are installed.

Any ideas?

Thanks in advance
Dieter