error: 'QSharedMemory' does not name a type

When I had tried to do "make" on embedded QT for arm architecture I have received an error:

make[3]: Leaving directory `/home/kolumb/QT/embedded/qt-everywhere-opensource-src-4.8.5/examples/graphicsview/portedasteroids'
make[2]: Leaving directory `/home/kolumb/QT/embedded/qt-everywhere-opensource-src-4.8.5/examples/graphicsview'
cd ipc/ && make -f Makefile
make[2]: Entering directory `/home/kolumb/QT/embedded/qt-everywhere-opensource-src-4.8.5/examples/ipc'
cd sharedmemory/ && make -f Makefile
make[3]: Entering directory `/home/kolumb/QT/embedded/qt-everywhere-opensource-src-4.8.5/examples/ipc/sharedmemory'
/home/kolumb/QT/embedded/qt-everywhere-opensource-src-4.8.5/bin/qmake -spec ../../../mkspecs/qws/linux-arm-g++ -o Makefile sharedmemory.pro
make[3]: Leaving directory `/home/kolumb/QT/embedded/qt-everywhere-opensource-src-4.8.5/examples/ipc/sharedmemory'
make[3]: Entering directory `/home/kolumb/QT/embedded/qt-everywhere-opensource-src-4.8.5/examples/ipc/sharedmemory'
/home/kolumb/QT/embedded/qt-everywhere-opensource-src-4.8.5/bin/uic dialog.ui -o .uic/release-shared-emb-arm/ui_dialog.h
arm-linux-g++ -c -pipe -fno-exceptions -O2 -Wall -W -D_REENTRANT -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -DQT_SHARED -I../../../mkspecs/qws/linux-arm-g++ -I. -I../../../include/QtCore -I../../../include/QtNetwork -I../../../include/QtGui -I../../../include -I.moc/release-shared-emb-arm -I.uic/release-shared-emb-arm -o .obj/release-shared-emb-arm/main.o main.cpp
In file included from main.cpp:42:0:
dialog.h:65:5: error: 'QSharedMemory' does not name a type
QSharedMemory sharedMemory;
^
make[3]: *** [.obj/release-shared-emb-arm/main.o] Error 1
make[3]: Leaving directory `/home/kolumb/QT/embedded/qt-everywhere-opensource-src-4.8.5/examples/ipc/sharedmemory'
make[2]: *** [sub-sharedmemory-make_default] Error 2
make[2]: Leaving directory `/home/kolumb/QT/embedded/qt-everywhere-opensource-src-4.8.5/examples/ipc'
make[1]: *** [sub-ipc-make_default] Error 2
make[1]: Leaving directory `/home/kolumb/QT/embedded/qt-everywhere-opensource-src-4.8.5/examples'
make: *** [sub-examples-make_default-ordered] Error 2