Problems compiling modrdb on Debian AMD64 system.

I found an old post from 2007 that seems simular to my problem.
(Problems compiling whoisserver Wed, 12 Sep 2007 02:18:11)
No replys what i could find tho.
Hints to resolve this issue is greatly helpfull.

/Christian

if gcc -DHAVE_CONFIG_H -I. -I. -I.. -pthread -I/usr/include/glib-2.0 
-I/usr/lib/glib-2.0/include   -I/usr/include/mysql -DBIG_JOINS=1 
-I/usr/include/libxml2  -g -O2 -I/usr/include/openssl 
-I/usr/local/include/openssl  -I/usr/include/c-client/ 
-I/root/modrdb/src/../src/modules/rpsl 
-I/root/modrdb/src/.././src/include -I/root/modrdb/src/../src/include    
-g -O2 -I/usr/include/openssl -I/usr/local/include/openssl -MT 
inet_ntop.o -MD -MP -MF ".deps/inet_ntop.Tpo" -c -o inet_ntop.o `test -f 
'modules/ip/inet_ntop.c' || echo './'`modules/ip/inet_ntop.c; \
        then mv -f ".deps/inet_ntop.Tpo" ".deps/inet_ntop.Po"; else rm 
-f ".deps/inet_ntop.Tpo"; exit 1; fi
In file included from modules/ip/inet_ntop.c:39:
modules/ip/inet6def.h:42: error: conflicting types for âinet_ntopâ
/usr/include/arpa/inet.h:67: error: previous declaration of âinet_ntopâ 
was here
modules/ip/inet_ntop.c:59: error: conflicting types for âinet_ntopâ
/usr/include/arpa/inet.h:67: error: previous declaration of âinet_ntopâ 
was here
modules/ip/inet_ntop.c: In function âinet_ntopâ:
modules/ip/inet_ntop.c:63: error: argument âsizeâ doesnât match prototype
/usr/include/arpa/inet.h:67: error: prototype declaration
make[3]: *** [inet_ntop.o] Error 1
make[3]: Leaving directory `/root/modrdb/src'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/root/modrdb/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/root/modrdb'
make: *** [all] Error 2