sed for adding word

hello

i have a file (myfile) contains line as follows

/home/mytarget/myproject

i want to add a pattern at the end of this line.
my pattern is- /.mk
i want like it - /home/mytarget/myproject/.mk

i tried sed like
sed 's/$//*.mk/' myfile > newfilename, but not wrking.
pls help
shailesh

Try

sed 's!$!\/\*\.mk!'

You got to escape special characters. Exclamation mark instead of slashes for easier reading.

it works. thanks
BR
shailesh