diff --git a/package/uclibc/Config.in b/package/uclibc/Config.in
index e7229085c0..1448037ff1 100644
--- a/package/uclibc/Config.in
+++ b/package/uclibc/Config.in
@@ -48,6 +48,7 @@ config BR2_TOOLCHAIN_BUILDROOT_LOCALE
 choice
 	prompt "Thread library implementation"
 	default BR2_PTHREADS_NATIVE
+	default BR2_PTHREADS_OLD if !BR2_USE_MMU
 	help
 	  Use this option to select the thread library implementation
 	  that should be used in your toolchain.
@@ -69,6 +70,7 @@ choice
 		bool "Native POSIX Threading (NPTL)"
 		select BR2_TOOLCHAIN_HAS_THREADS
 		select BR2_TOOLCHAIN_HAS_THREADS_NPTL
+		depends on BR2_USE_MMU
 		depends on !BR2_m68k && !BR2_x86_i386
 endchoice