diff --git a/package/nginx/Config.in b/package/nginx/Config.in
index da9fd018f0..30cc9d2d13 100644
--- a/package/nginx/Config.in
+++ b/package/nginx/Config.in
@@ -1,9 +1,11 @@
 comment "nginx needs a toolchain w/ largefile"
 	depends on !BR2_LARGEFILE
+	depends on BR2_USE_MMU # fork()
 
 menuconfig BR2_PACKAGE_NGINX
 	bool "nginx"
 	depends on BR2_LARGEFILE
+	depends on BR2_USE_MMU # fork()
 	help
 	  nginx is an HTTP and reverse proxy server, as well as a mail proxy
 	  server.