diff --git a/package/sdl2/Config.in b/package/sdl2/Config.in
index b73611dbb0..8fc14ee737 100644
--- a/package/sdl2/Config.in
+++ b/package/sdl2/Config.in
@@ -21,11 +21,13 @@ comment "DirectFB video driver needs directfb"
 config BR2_PACKAGE_SDL2_X11
 	bool "X11 video driver"
 	depends on BR2_PACKAGE_XORG7
+	depends on BR2_USE_MMU # fork()
 	select BR2_PACKAGE_XLIB_LIBX11
 	select BR2_PACKAGE_XLIB_LIBXEXT
 
 comment "X11 video driver needs X.org"
 	depends on !BR2_PACKAGE_XORG7
+	depends on BR2_USE_MMU
 
 endif