diff --git a/libc/include/sys/cdefs.h b/libc/include/sys/cdefs.h
index 24b341e..3fcf163 100644
--- a/libc/include/sys/cdefs.h
+++ b/libc/include/sys/cdefs.h
@@ -459,6 +459,8 @@
 #define __DEPRECATED_IN(api_level) __AVAILABILITY(deprecated=api_level)
 #define __REMOVED_IN(api_level) __AVAILABILITY(obsoleted=api_level)
 
+#define __INTRODUCED_IN_FUTURE __INTRODUCED_IN(10000)
+
 #if __LP64__
 #define __INTRODUCED_IN_32(api_level)
 #define __INTRODUCED_IN_64 __INTRODUCED_IN
diff --git a/libc/include/sys/quota.h b/libc/include/sys/quota.h
index 85bb780..08ca982 100644
--- a/libc/include/sys/quota.h
+++ b/libc/include/sys/quota.h
@@ -40,7 +40,7 @@
 
 __BEGIN_DECLS
 
-int quotactl(int, const char*, int, char*) __INTRODUCED_IN(25);
+int quotactl(int, const char*, int, char*) __INTRODUCED_IN_FUTURE;
 
 __END_DECLS