Makefile problem

Hi, I'm trying to use a makefile, but for some reason I am receiving this error:
"make: *** No rule to make target `main.oo', needed by `main.o'. Stop."

I am puzzled, because I've had to previously use makefile and I used that as a template. They appear to be the same (except this one had only one .cc and .h file each) and the previous one worked.

Code:

---

lines: line.o main.o
        g++ line.o main.o -o lines

line.o: line.cc line.h
        g++ -c line.cc

main.o: main.oo line.h
        g++ -c main.cc

---

main.o: main.cc line.h

You put oo instead of cc. That's the problem.

Ack!

What a rubbish mistake. Thank you.