ofxVLCVideoPlayer compile error in Raspberry piB+

In file included from /home/pi/ofApp/addons/ofxVLCVideoPlayer/src/ofxVLCVideoPlayer.h:4:0,
from /home/pi/ofApp/src/ofApp.h:5,
from /home/pi/ofApp/src/ofApp.cpp:1:
/home/pi/ofApp/addons/ofxVLCVideoPlayer/src/VLCMovie.h:45:5: error: ‘Poco’ does not name a type
Poco::Mutex backImageMutex;
^~~~
/home/pi/ofApp/addons/ofxVLCVideoPlayer/src/VLCMovie.h:46:5: error: ‘Poco’ does not name a type
Poco::Mutex imageFlipMutex;
^~~~
/home/pi/ofApp/libs/openFrameworksCompiled/project/makefileCommon/compile.project.mk:215: recipe for target ‘obj/linuxarmv6l/Release/src/ofApp.o’ failed
make[1]: *** [obj/linuxarmv6l/Release/src/ofApp.o] Error 1
make[1]: Leaving directory ‘/home/pi/ofApp’
/home/pi/ofApp/libs/openFrameworksCompiled/project/makefileCommon/compile.project.mk:124: recipe for target ‘Release’ failed

Hi,
anyone can help me to solved this problem