diff --git a/package/x11r7/xapp_xfs/Config.in b/package/x11r7/xapp_xfs/Config.in
index e71d89fe5d..8b72445f8a 100644
--- a/package/x11r7/xapp_xfs/Config.in
+++ b/package/x11r7/xapp_xfs/Config.in
@@ -3,5 +3,6 @@ config BR2_PACKAGE_XAPP_XFS
 	select BR2_PACKAGE_XLIB_LIBFS
 	select BR2_PACKAGE_XLIB_LIBXFONT
 	select BR2_PACKAGE_XPROTO_FONTSPROTO
+	depends on BR2_USE_MMU # fork()
 	help
 	  X font server