diff --git a/src/unix/notbsd/android/mod.rs b/src/unix/notbsd/android/mod.rs
index 2000bc89..2511a1b7 100644
--- a/src/unix/notbsd/android/mod.rs
+++ b/src/unix/notbsd/android/mod.rs
@@ -646,8 +646,6 @@ extern {
                        result: *mut *mut ::dirent64) -> ::c_int;
     pub fn getrlimit64(resource: ::c_int, rlim: *mut rlimit64) -> ::c_int;
     pub fn setrlimit64(resource: ::c_int, rlim: *const rlimit64) -> ::c_int;
-    pub fn readahead(fd: ::c_int, offset: ::off64_t,
-                     count: ::size_t) -> ::ssize_t;
 }
 
 cfg_if! {