diff --git a/package/proftpd/Config.in b/package/proftpd/Config.in
index 7793713474..18407d173d 100644
--- a/package/proftpd/Config.in
+++ b/package/proftpd/Config.in
@@ -1,5 +1,6 @@
 config BR2_PACKAGE_PROFTPD
 	bool "proftpd"
+	depends on BR2_USE_MMU # fork()
 	help
 	  ProFTPD, a highly configurable FTP server.