diff --git a/libc/include/threads.h b/libc/include/threads.h
index 752761d..1b00b8f 100644
--- a/libc/include/threads.h
+++ b/libc/include/threads.h
@@ -78,7 +78,7 @@
 
 __BEGIN_DECLS
 
-#if __ANDROID_API__ >= __ANDROID_API_R__
+#if __ANDROID_API__ >= 30
 // This file is implemented as static inlines before API level 30.
 
 /** Uses `__flag` to ensure that `__function` is called exactly once. */