diff --git a/libc/include/sys/socket.h b/libc/include/sys/socket.h
index c87465f..2dc54aa 100644
--- a/libc/include/sys/socket.h
+++ b/libc/include/sys/socket.h
@@ -326,7 +326,7 @@
         socklen_t*) __overloadable __RENAME_CLANG(recvfrom);
 
 extern ssize_t __sendto_chk(int, const void*, size_t, size_t, int, const struct sockaddr*,
-        socklen_t) __INTRODUCED_IN_FUTURE;
+        socklen_t) __INTRODUCED_IN(26);
 ssize_t __recvfrom_chk(int, void*, size_t, size_t, int, struct sockaddr*,
         socklen_t*) __INTRODUCED_IN(21);