diff --git a/init/main.c b/init/main.c
index 9cf77ab138a68738bb6926b8b31aaf6ba8cd4f6e..e33e09df3cbc61ad11736776ef4138010df1de8e 100644
--- a/init/main.c
+++ b/init/main.c
@@ -442,9 +442,11 @@ void __init __weak smp_setup_processor_id(void)
 {
 }
 
+# if THREAD_SIZE >= PAGE_SIZE
 void __init __weak thread_info_cache_init(void)
 {
 }
+#endif
 
 /*
  * Set up kernel memory allocators