problem making mod_perl after upgrading perl to 5.18.1

I recently updated my perl version to 5.18.1 and wanted to recompile 
mod_perl to get the updated perl in my Apache 2.2.25 webserver.

Here is the output of make

cc -I/usr/local/src/mod_perl-2.0.7/src/modules/perl 
-I/usr/local/src/mod_perl-2.0.7/xs -I/usr/local/apache-2.2.25/include 
-I/usr/local/apache-2.2.25/include -I/usr/local/apache-2.2.25/include 
-fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include 
-I/usr/local/lib/perl5/5.18.1/x86_64-linux/CORE -DMOD_PERL 
-DMP_COMPAT_1X -DLINUX -D_REENTRANT -D_GNU_SOURCE -O2 -fPIC \
         -c modperl_perl.c && mv modperl_perl.o modperl_perl.lo
modperl_perl.c: In function âmodperl_hash_seed_setâ:
modperl_perl.c:272: error: âPL_rehash_seedâ undeclared (first use in 
this function)
modperl_perl.c:272: error: (Each undeclared identifier is reported only once
modperl_perl.c:272: error: for each function it appears in.)
modperl_perl.c:273: error: âPL_rehash_seed_setâ undeclared (first use in 
this function)
make[1]: *** [modperl_perl.lo] Error 1
make[1]: Leaving directory `/usr/local/src/mod_perl-2.0.7/src/modules/perl'
make: *** [modperl_lib] Error 2

mod_perl compiled and is running OK with my previous version of perl 5.14.2

Thanks for any help.
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