diff --git a/package/startup-notification/Config.in b/package/startup-notification/Config.in
index 277d30024c..1fc6dad1e7 100644
--- a/package/startup-notification/Config.in
+++ b/package/startup-notification/Config.in
@@ -2,6 +2,7 @@ config BR2_PACKAGE_STARTUP_NOTIFICATION
 	bool "startup-notification"
 	select BR2_PACKAGE_XLIB_LIBX11
 	depends on BR2_PACKAGE_XORG7
+	depends on BR2_USE_MMU # fork()
 	help
 	  Startup-notification is a library used to monitor application startup.