Can't compile Subversion against Serf-1.3.9.

Dear Sir,

I am getting trouble to rebuild subversion-1.9.4 on my FreeBSD-10.3 box
after Serf be updated to 1.3.9:

cd subversion/svn && /bin/sh
"/usr/ports/devel/subversion/work/subversion-1.9.4/libtool" --tag=CC
--silent --mode=link cc -Werror=unknown-warning-option -O2 -pipe
-march=native -fpic -DPIC -fstack-protector -fno-strict-aliasing -O2
-pipe -march=native -fpic -DPIC -fstack-protector -fno-strict-aliasing
-fstack-protector -L/usr/local/lib -L/usr/local/lib/db5
-L/usr/local/lib -L/usr/local/lib -rpath /usr/local/lib -o svn
add-cmd.lo auth-cmd.lo blame-cmd.lo cat-cmd.lo changelist-cmd.lo
checkout-cmd.lo cl-conflicts.lo cleanup-cmd.lo commit-cmd.lo
conflict-callbacks.lo copy-cmd.lo delete-cmd.lo deprecated.lo
diff-cmd.lo export-cmd.lo file-merge.lo help-cmd.lo import-cmd.lo
info-cmd.lo list-cmd.lo lock-cmd.lo log-cmd.lo merge-cmd.lo
mergeinfo-cmd.lo mkdir-cmd.lo move-cmd.lo notify.lo patch-cmd.lo
propdel-cmd.lo propedit-cmd.lo propget-cmd.lo proplist-cmd.lo props.lo
propset-cmd.lo relocate-cmd.lo resolve-cmd.lo resolved-cmd.lo
revert-cmd.lo similarity.lo status-cmd.lo status.lo svn.lo switch-cmd.lo
unlock-cmd.lo update-cmd.lo upgrade-cmd.lo util.lo
../../subversion/libsvn_client/libsvn_client-1.la
../../subversion/libsvn_wc/libsvn_wc-1.la
../../subversion/libsvn_ra/libsvn_ra-1.la
../../subversion/libsvn_delta/libsvn_delta-1.la
../../subversion/libsvn_diff/libsvn_diff-1.la
../../subversion/libsvn_subr/libsvn_subr-1.la -L/usr/local/lib
-laprutil-1 -L/usr/local/lib -lapr-1
/usr/local/lib/libserf-1.so: undefined reference to `BIO_meth_set_gets'
/usr/local/lib/libserf-1.so: undefined reference to `OPENSSL_malloc_init'
/usr/local/lib/libserf-1.so: undefined reference to `BIO_set_data'
/usr/local/lib/libserf-1.so: undefined reference to `BIO_set_init'
/usr/local/lib/libserf-1.so: undefined reference to `BIO_meth_free'
/usr/local/lib/libserf-1.so: undefined reference to `BIO_meth_set_destroy'
/usr/local/lib/libserf-1.so: undefined reference to `BIO_meth_set_write'
/usr/local/lib/libserf-1.so: undefined reference to `BIO_meth_set_read'
/usr/local/lib/libserf-1.so: undefined reference to `BIO_get_data'
/usr/local/lib/libserf-1.so: undefined reference to `BIO_set_shutdown'
/usr/local/lib/libserf-1.so: undefined reference to `BIO_meth_new'
/usr/local/lib/libserf-1.so: undefined reference to `BIO_meth_set_create'
/usr/local/lib/libserf-1.so: undefined reference to `BIO_meth_set_ctrl'
cc: error: linker command failed with exit code 1 (use -v to see invocation)
*** Error code 1

Stop.
make[2]: stopped in /usr/ports/devel/subversion/work/subversion-1.9.4
*** Error code 1

Stop.
make[1]: stopped in /usr/ports/devel/subversion
*** Error code 1

Stop.
make: stopped in /usr/ports/devel/subversion

===>>> make build failed for devel/subversion
===>>> Aborting update

Thanks!

-- 
*Alexandre Cortes Guimarães, M.Sc.*
/Rio de Janeiro, Brazil/
e-mail: alexandre.guimaraes_at_campus.ul.pt 
<mailto:alexandre.guimaraes_at_campus.ul.pt>