[Exim] Problem compiling exim 4.10 - missing db.h ??

I try to upgrade to exim 4.10 but I get error and output like this

gcc -c -O  -DCOMPILE_UTILITY -o util-spool_in.o spool_in.c
In file included from exim.h:324,
                 from spool_in.c:12:
dbstuff.h:101:16: db.h: No such file or directory
make[1]: *** [util-spool_in.o] Error 1

I try to find db.h but with no success.

Any sugestion?