diff --git a/package/ntp/Config.in b/package/ntp/Config.in
index 97d933b5a8..78f008a4b8 100644
--- a/package/ntp/Config.in
+++ b/package/ntp/Config.in
@@ -1,5 +1,6 @@
 config BR2_PACKAGE_NTP
 	bool "ntp"
+	depends on BR2_USE_MMU || BR2_TOOLCHAIN_HAS_THREADS
 	select BR2_PACKAGE_LIBEVENT
 	help
 	  Network Time Protocol suite/programs.