diff --git a/libc/include/sys/quota.h b/libc/include/sys/quota.h
index 6e32705..af09674 100644
--- a/libc/include/sys/quota.h
+++ b/libc/include/sys/quota.h
@@ -51,6 +51,10 @@
  *
  * Available since API level 26.
  */
+
+#if __BIONIC_AVAILABILITY_GUARD(26)
 int quotactl(int __op, const char* _Nullable __special, int __id, char* __BIONIC_COMPLICATED_NULLNESS __addr) __INTRODUCED_IN(26);
+#endif /* __BIONIC_AVAILABILITY_GUARD(26) */
+
 
 __END_DECLS