diff --git a/package/inadyn/Config.in b/package/inadyn/Config.in
index 623da419de..a2dfa7419b 100644
--- a/package/inadyn/Config.in
+++ b/package/inadyn/Config.in
@@ -1,5 +1,6 @@
 config BR2_PACKAGE_INADYN
 	bool "inadyn"
+	depends on BR2_USE_MMU # Uses fork()
 	help
 	  INADYN is a free DynDNS client. It gives the possibility
 	  to have your own fixed hostname registered on the internet,