diff --git a/package/atf/Config.in b/package/atf/Config.in
index 59712abc2b..43a5d4f2c9 100644
--- a/package/atf/Config.in
+++ b/package/atf/Config.in
@@ -1,6 +1,7 @@
 config BR2_PACKAGE_ATF
 	bool "atf"
 	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_USE_MMU # fork()
 	help
 	  ATF, or Automated Testing Framework, is a collection of
 	  libraries to write test programs in C, C++ and POSIX shell.
@@ -9,3 +10,4 @@ config BR2_PACKAGE_ATF
 
 comment "atf needs a toolchain w/ C++"
 	depends on !BR2_INSTALL_LIBSTDCPP
+	depends on BR2_USE_MMU