diff --git a/package/x11r7/xapp_xf86dga/Config.in b/package/x11r7/xapp_xf86dga/Config.in
index 769ebf6f2..8a13bd4df 100644
--- a/package/x11r7/xapp_xf86dga/Config.in
+++ b/package/x11r7/xapp_xf86dga/Config.in
@@ -2,5 +2,6 @@ config BR2_PACKAGE_XAPP_XF86DGA
 	bool "xf86dga"
 	select BR2_PACKAGE_XLIB_LIBX11
 	select BR2_PACKAGE_XLIB_LIBXXF86DGA
+	depends on BR2_USE_MMU # fork()
 	help
 	  test program for the XFree86-DGA extension