diff --git a/package/mtools/Config.in b/package/mtools/Config.in
index c471d77d75..58652232e5 100644
--- a/package/mtools/Config.in
+++ b/package/mtools/Config.in
@@ -1,6 +1,7 @@
 config BR2_PACKAGE_MTOOLS
 	bool "mtools"
 	depends on BR2_USE_WCHAR
+	depends on BR2_USE_MMU # fork()
 	help
 	  Mtools is a collection of utilities to access MS-DOS disks from
 	  Unix without mounting them. It supports Win'95 style long file