diff --git a/package/mdadm/Config.in b/package/mdadm/Config.in
index c5133488f5..e0d606b5ec 100644
--- a/package/mdadm/Config.in
+++ b/package/mdadm/Config.in
@@ -1,5 +1,6 @@
 config BR2_PACKAGE_MDADM
 	bool "mdadm"
+	depends on BR2_USE_MMU # fork()
 	help
 	  Utility for managing Linux Software RAID arrays.