diff --git a/package/znc/Config.in b/package/znc/Config.in
index c055f9f2d9..274e5370b2 100644
--- a/package/znc/Config.in
+++ b/package/znc/Config.in
@@ -1,6 +1,7 @@
 config BR2_PACKAGE_ZNC
 	bool "znc"
 	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_USE_MMU # fork()
 	help
 	  Advanced IRC bouncer
 
@@ -8,3 +9,4 @@ config BR2_PACKAGE_ZNC
 
 comment "znc needs a toolchain w/ C++"
 	depends on !BR2_INSTALL_LIBSTDCPP
+	depends on BR2_USE_MMU