diff --git a/package/rdesktop/Config.in b/package/rdesktop/Config.in
index c0abe270dc..f683ed314e 100644
--- a/package/rdesktop/Config.in
+++ b/package/rdesktop/Config.in
@@ -1,5 +1,6 @@
 config BR2_PACKAGE_RDESKTOP
 	bool "rdesktop"
+	depends on BR2_USE_MMU # fork()
 	select BR2_PACKAGE_OPENSSL
 	select BR2_PACKAGE_XLIB_LIBX11
 	select BR2_PACKAGE_XLIB_LIBXT