kernel compilation and ncurses problem

["Bambang Purnomosidi D. P." <bpdp@3wsi.net>]

I will upgrade my kernet to 2.4.12 because of security problems. When I tried 
to make menuconfig, it showed error:

------------------------------
rm -f include/asm
( cd include ; ln -sf asm-i386 asm)
make -C scripts/lxdialog all
make[1]: Entering directory `/usr/src/linux/scripts/lxdialog'
/usr/bin/ld: cannot find -lncurses
collect2: ld returned 1 exit status

>> Unable to find the Ncurses libraries.
>>
>> You must have Ncurses installed in order
>> to use 'make menuconfig'

make[1]: *** [ncurses] Error 1
make[1]: Leaving directory `/usr/src/linux/scripts/lxdialog'
make: *** [menuconfig] Error 2
-----------------------------

I already have (from unstable) libncurses5, ncurses-bin, ncurses-term, and 
ncurses-base.

DId I miss something??

Any help appreciated.

--
bpdp