diff --git a/package/keyutils/Config.in b/package/keyutils/Config.in
index 9b9f9bc..6978687 100644
--- a/package/keyutils/Config.in
+++ b/package/keyutils/Config.in
@@ -1,6 +1,7 @@
 config BR2_PACKAGE_KEYUTILS
 	bool "keyutils"
 	depends on !BR2_avr32 && !BR2_microblaze
+	depends on BR2_USE_MMU # fork()
 	help
 	  These tools are used to control the key management system
 	  built into the Linux kernel.