diff --git a/package/quagga/Config.in b/package/quagga/Config.in
index e79ab02b24..ebec2c8418 100644
--- a/package/quagga/Config.in
+++ b/package/quagga/Config.in
@@ -1,5 +1,6 @@
 config BR2_PACKAGE_QUAGGA
 	bool "quagga"
+	depends on BR2_USE_MMU # fork()
 	help
 	  Routing software suite, providing implementations of
 	  OSPFv2, OSPFv3 (IPv6), RIP v1 and v2, RIPng (IPv6) and BGPv4+.