what needs to be included in the configuration to use dbus?

I'm using stripped down as much as possible configuration of Qt but now I need to use the dbus and can't figure out what I need to include to be able to use it? There doesnt seem to be anything obvious to me using the qconfig tool. The errors I get at the moment when making are:

qdbus_symbols.cpp:53: error: expected initializer before ‘*’ token
qdbus_symbols.cpp: In function ‘void qdbus_unloadLibDBus()’:
qdbus_symbols.cpp:57: error: ‘qdbus_libdbus’ was not declared in this scope
qdbus_symbols.cpp: In function ‘bool qdbus_loadLibDBus()’:
qdbus_symbols.cpp:67: error: ‘QLibrary’ was not declared in this scope
qdbus_symbols.cpp:67: error: ‘lib’ was not declared in this scope
qdbus_symbols.cpp:67: error: ‘qdbus_libdbus’ was not declared in this scope
qdbus_symbols.cpp:71: error: expected type-specifier before ‘QLibrary’
qdbus_symbols.cpp:71: error: expected ‘;’ before ‘QLibrary’
qdbus_symbols.cpp:85: error: type ‘<type error>’ argument given to ‘delete’, expected pointer
qdbus_symbols.cpp: In function ‘void* qdbus_resolve_conditionally(const char*)’:
qdbus_symbols.cpp:93: error: ‘qdbus_libdbus’ was not declared in this scope
qdbus_symbols.cpp: In function ‘void* qdbus_resolve_me(const char*)’:
qdbus_symbols.cpp:103: error: ‘qdbus_libdbus’ was not declared in this scope
make[1]: *** [.obj/release-static-emb-x86/qdbus_symbols.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: Leaving directory `/home/mark/qt-qvfb-4.5.3-static/src/dbus'
make: *** [sub-dbus-make_default-ordered] Error 2

Does anyone know a module that I must not be including which is necessary or how to find out? thanks