help_vars.Add(PathVariable('TIZENRT_OS_DIR', 'Absolute Path to TizenRT OS directory', None, PathVariable.PathAccept))
help_vars.Add(EnumVariable('PLATFORM_TLS', 'Use platform tls instead of local mbedtls', '0', allowed_values=('0', '1')))
help_vars.Add(EnumVariable('OIC_SUPPORT_TIZEN_TRACE', 'Tizen Trace(T-trace) api availability', 'False', allowed_values=('True', 'False')))
-help_vars.Add(EnumVariable('WITH_PROCESS_EVENT','Build including procee event logics in ocstack', 'False', allowed_values=('True', 'False')))
+help_vars.Add(BoolVariable('WITH_PROCESS_EVENT','Build including process event logics in ocstack', 'False'))
AddOption('--prefix',
dest='prefix',
type='string',