diff --git a/package/netsnmp/Config.in b/package/netsnmp/Config.in
index d94abb7bda..3d089362f4 100644
--- a/package/netsnmp/Config.in
+++ b/package/netsnmp/Config.in
@@ -1,5 +1,6 @@
 config BR2_PACKAGE_NETSNMP
 	bool "netsnmp"
+	depends on BR2_USE_MMU # fork()
 	help
 	  Suite of applications used to implement SNMP v1, SNMP v2c, and
 	  SNMP v3 using both IPv4 and IPv6.
diff --git a/package/quagga/Config.in b/package/quagga/Config.in
index c364ae1b4b..90eaef4bfc 100644
--- a/package/quagga/Config.in
+++ b/package/quagga/Config.in
@@ -80,6 +80,7 @@ config BR2_PACKAGE_QUAGGA_WATCHQUAGGA
 
 config BR2_PACKAGE_QUAGGA_SNMP
 	bool "SNMP support"
+	depends on BR2_USE_MMU # net-snmp
 	select BR2_PACKAGE_NETSNMP
 	help
 	  Make quagga information available via SNMP SMUX.