diff --git a/package/libxmlrpc/Config.in b/package/libxmlrpc/Config.in
index 33d512328e..798c286f2d 100644
--- a/package/libxmlrpc/Config.in
+++ b/package/libxmlrpc/Config.in
@@ -1,6 +1,7 @@
 config BR2_PACKAGE_LIBXMLRPC
 	bool "libxmlrpc"
 	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on BR2_USE_MMU # fork()
 	select BR2_PACKAGE_LIBCURL
 	help
 	  XML-RPC is a quick-and-easy way to make procedure calls over
@@ -24,4 +25,5 @@ comment "cli tool needs a toolchain w/ dynamic library"
 endif # BR2_PACKAGE_LIBXMLRPC
 
 comment "libxmlrpc needs a toolchain w/ threads"
+	depends on BR2_USE_MMU
 	depends on !BR2_TOOLCHAIN_HAS_THREADS