diff --git a/libc/include/sys/uio.h b/libc/include/sys/uio.h
index 72675d1..7a009b4 100644
--- a/libc/include/sys/uio.h
+++ b/libc/include/sys/uio.h
@@ -42,16 +42,18 @@
 ssize_t preadv(int, const struct iovec*, int, off_t) __RENAME(preadv64);
 ssize_t pwritev(int, const struct iovec*, int, off_t) __RENAME(pwritev64);
 #else
-ssize_t preadv(int, const struct iovec*, int, off_t);
-ssize_t pwritev(int, const struct iovec*, int, off_t);
+ssize_t preadv(int, const struct iovec*, int, off_t) __INTRODUCED_IN(24);
+ssize_t pwritev(int, const struct iovec*, int, off_t) __INTRODUCED_IN(24);
 #endif
-ssize_t preadv64(int, const struct iovec*, int, off64_t);
-ssize_t pwritev64(int, const struct iovec*, int, off64_t);
+ssize_t preadv64(int, const struct iovec*, int, off64_t) __INTRODUCED_IN(24);
+ssize_t pwritev64(int, const struct iovec*, int, off64_t) __INTRODUCED_IN(24);
 #endif
 
 #if defined(__USE_GNU)
-ssize_t process_vm_readv(pid_t, const struct iovec*, unsigned long, const struct iovec*, unsigned long, unsigned long);
-ssize_t process_vm_writev(pid_t, const struct iovec*, unsigned long, const struct iovec*, unsigned long, unsigned long);
+ssize_t process_vm_readv(pid_t, const struct iovec*, unsigned long, const struct iovec*,
+                         unsigned long, unsigned long) __INTRODUCED_IN(23);
+ssize_t process_vm_writev(pid_t, const struct iovec*, unsigned long, const struct iovec*,
+                          unsigned long, unsigned long) __INTRODUCED_IN(23);
 #endif
 
 __END_DECLS