trying to do surf detection

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i am trying to implement surf detection with ros and opencv but when i try to create the package it just shows me

[100%] Building CXX object project/CMakeFiles/Feature_Detector.dir/src/Feature_Detector.cpp.o

/home/maurice/catkin_ws/src/project/src/Feature_Detector.cpp:5:42: fatal error: opencv2/nonfree/features2d.hpp: No such file or directory

 #include <opencv2/nonfree/features2d.hpp>
                                          ^
compilation terminated.

make[2]: *** [project/CMakeFiles/Feature_Detector.dir/src/Feature_Detector.cpp.o] Error 1

make[1]: *** [project/CMakeFiles/Feature_Detector.dir/all] Error 2

make: *** [all] Error 2

Invoking "make -j4 -l4" failed

i have inserted the package in CMakeLists.txt

find_package(catkin REQUIRED COMPONENTS
  cv_bridge
  image_transport
  roscpp
  sensor_msgs
  std_msgs
  OpenCV 
)

and then i have also added the dependencies in the package.xml

<\build_depend>OpenCV<\build_depend>
<\run_depend>opencv<\run_depend>