diff --git a/package/x11r7/xapp_xinit/Config.in b/package/x11r7/xapp_xinit/Config.in
index aede5d9691..d9fb1c5fc8 100644
--- a/package/x11r7/xapp_xinit/Config.in
+++ b/package/x11r7/xapp_xinit/Config.in
@@ -1,5 +1,6 @@
 config BR2_PACKAGE_XAPP_XINIT
 	bool "xinit"
+	depends on BR2_USE_MMU # fork()
 	# Runtime dependency: can't start an X server unless there is one
 	depends on BR2_PACKAGE_XSERVER_XORG_SERVER
 	# Runtime dependency; mcookie is also in util-linux