AC_ARG_ENABLE(xf86vidmode, AS_HELP_STRING([--disable-xf86vidmode], [Build XF86VidMode extension (default: enabled)]), [XF86VIDMODE=$enableval], [XF86VIDMODE=yes])
AC_ARG_ENABLE(xf86misc, AS_HELP_STRING([--disable-xf86misc], [Build XF86Misc extension (default: enabled)]), [XF86MISC=$enableval], [XF86MISC=yes])
AC_ARG_ENABLE(xcsecurity, AS_HELP_STRING([--disable-xcsecurity], [Build Security extension (default: enabled)]), [XCSECURITY=$enableval], [XCSECURITY=yes])
-+AC_ARG_ENABLE(xcalibrate, AS_HELP_STRING([--disable-xcalibrate], [Build XCalibrate extension (default: enabled)]), [XCALIBRATE=$enableval], [XCALIBRATE=yes])
++AC_ARG_ENABLE(xcalibrate, AS_HELP_STRING([--enable-xcalibrate], [Build XCalibrate extension (default: disabled)]), [XCALIBRATE=$enableval], [XCALIBRATE=no])
AC_ARG_ENABLE(xevie, AS_HELP_STRING([--disable-xevie], [Build XEvIE extension (default: enabled)]), [XEVIE=$enableval], [XEVIE=yes])
AC_ARG_ENABLE(lbx, AS_HELP_STRING([--disable-lbx], [Build LBX extension (default: no)]), [LBX=$enableval], [LBX=no])
AC_ARG_ENABLE(appgroup, AS_HELP_STRING([--disable-appgroup], [Build XC-APPGROUP extension (default: enabled)]), [APPGROUP=$enableval], [APPGROUP=yes])