No "move_group_interface.h"

[txchitchat]

When I used command "catkin_make" to build the project, it displayed following bug:

       In file included from /home/.../src/RoboND-Perception-Project/pr2_robot/src/pr2_motion.cpp:12:0:
       /home/.../src/RoboND-Perception-Project/pr2_robot/include/pr2_robot/pr2_motion.h:20:62: fatal error: moveit/move_group_interface/move_group_interface.h: No such file or directory
       #include <moveit/move_group_interface/move_group_interface.h>
                                                                                                                  ^

How could I get the header file?