diff --git a/package/mongrel2/Config.in b/package/mongrel2/Config.in
index ca7e6093d0..435d97eaff 100644
--- a/package/mongrel2/Config.in
+++ b/package/mongrel2/Config.in
@@ -4,6 +4,7 @@ config BR2_PACKAGE_MONGREL2
 	select BR2_PACKAGE_ZEROMQ
 	depends on BR2_INSTALL_LIBSTDCPP # zeromq
 	depends on BR2_INET_IPV6 # zeromq
+	depends on BR2_TOOLCHAIN_HAS_THREADS # zeromq
 	depends on BR2_LARGEFILE # zeromq -> util-linux
 	depends on BR2_USE_WCHAR # zeromq -> util-linux
 	# {get,make,swap}context functions present in