diff --git a/src/unix/notbsd/linux/mod.rs b/src/unix/notbsd/linux/mod.rs
index 94774136..75258857 100644
--- a/src/unix/notbsd/linux/mod.rs
+++ b/src/unix/notbsd/linux/mod.rs
@@ -1508,7 +1508,8 @@ extern {
                   -> ::c_int;
 
     pub fn msync(addr: *mut ::c_void, len: ::size_t, flags: ::c_int) -> ::c_int;
-
+    pub fn remap_file_pages(addr: *mut ::c_void, size: ::size_t, prot: ::c_int,
+                            pgoff: ::size_t, flags: ::c_int) -> ::c_int;
     pub fn recvfrom(socket: ::c_int, buf: *mut ::c_void, len: ::size_t,
                     flags: ::c_int, addr: *mut ::sockaddr,
                     addrlen: *mut ::socklen_t) -> ::ssize_t;