[Exim] building problem: dbm?

Hello guys.
I'm getting an error while i try to build exim on suse linux 7.3.
I'm getting this error message:

------
gcc -O  -o exim_dbmbuild  exim_dbmbuild.c \
  -lnsl -lcrypt  -ldb
In file included from exim.h:332,
                 from exim_dbmbuild.c:30:
dbfn.h:107: db.h: No such file or directory
make[1]: *** [exim_dbmbuild] Error 1
make[1]: Leaving directory `/root/exim-3.33_main/build-Linux-i386'
make: *** [go] Error 2
------

can anyone help me?
-- basti