Cannot compile against opencv 2.4 #6

I'm using ubuntu 14.04 and installing the opencv libs via:

apt-get install libopencv-core2.4 libopencv-core-dev

but when I compile it's telling me it can't find the opencv/cv.h header file. When I look in /usr/include I'm not seeing it there either, instead I'm seeing opencv2/opencv.hpp