diff --git a/package/udpcast/Config.in b/package/udpcast/Config.in
index cb817a9140..cae27bd287 100644
--- a/package/udpcast/Config.in
+++ b/package/udpcast/Config.in
@@ -2,6 +2,7 @@ config BR2_PACKAGE_UDPCAST
 	bool "udpcast"
 	depends on BR2_LARGEFILE
 	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on BR2_USE_MMU # fork()
 	help
 	  A multicast protocol implementation which happens to
 	  be very handy for imaging drives over the network.