diff --git a/libc/include/sys/time.h b/libc/include/sys/time.h
index 6ba7a37..d12c306 100644
--- a/libc/include/sys/time.h
+++ b/libc/include/sys/time.h
@@ -47,8 +47,12 @@
 int utimes(const char* _Nonnull __path, const struct timeval __times[_Nullable 2]);
 
 #if defined(__USE_BSD)
+
+#if __BIONIC_AVAILABILITY_GUARD(26)
 int futimes(int __fd, const struct timeval __times[_Nullable 2]) __INTRODUCED_IN(26);
 int lutimes(const char* _Nonnull __path, const struct timeval __times[_Nullable 2]) __INTRODUCED_IN(26);
+#endif /* __BIONIC_AVAILABILITY_GUARD(26) */
+
 #endif
 
 #if defined(__USE_GNU)
@@ -65,7 +69,11 @@
  *
  * Available since API level 26.
  */
+
+#if __BIONIC_AVAILABILITY_GUARD(26)
 int futimesat(int __dir_fd, const char* __BIONIC_COMPLICATED_NULLNESS __path, const struct timeval __times[_Nullable 2]) __INTRODUCED_IN(26);
+#endif /* __BIONIC_AVAILABILITY_GUARD(26) */
+
 #endif
 
 #define timerclear(a)   \