diff --git a/src/unix/bsd/freebsdlike/freebsd/freebsd13/mod.rs b/src/unix/bsd/freebsdlike/freebsd/freebsd13/mod.rs
index 4145b4ecdac95..a974146d69577 100644
--- a/src/unix/bsd/freebsdlike/freebsd/freebsd13/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/freebsd13/mod.rs
@@ -209,6 +209,8 @@ pub const ELAST: ::c_int = 97;
 pub const GRND_INSECURE: ::c_uint = 0x4;
 
 extern "C" {
+    pub fn aio_readv(aiocbp: *mut ::aiocb) -> ::c_int;
+    pub fn aio_writev(aiocbp: *mut ::aiocb) -> ::c_int;
     pub fn setgrent();
     pub fn mprotect(
         addr: *mut ::c_void,