diff --git a/build.rs b/build.rs
index e1c9b23c4617f..8b599183f5ec9 100644
--- a/build.rs
+++ b/build.rs
@@ -15,7 +15,6 @@ const ALLOWED_CFGS: &'static [&'static str] = &[
     "freebsd14",
     "freebsd15",
     "libc_deny_warnings",
-    "libc_long_array",
     "libc_thread_local",
     "libc_ctest",
 ];
@@ -77,11 +76,6 @@ fn main() {
         set_cfg("libc_deny_warnings");
     }
 
-    // Rust >= 1.47 supports long array:
-    if rustc_minor_ver >= 47 || rustc_dep_of_std {
-        set_cfg("libc_long_array");
-    }
-
     // #[thread_local] is currently unstable
     if rustc_dep_of_std {
         set_cfg("libc_thread_local");
diff --git a/src/unix/bsd/apple/long_array.rs b/src/unix/bsd/apple/long_array.rs
deleted file mode 100644
index 4c56a275ab32a..0000000000000
--- a/src/unix/bsd/apple/long_array.rs
+++ /dev/null
@@ -1,8 +0,0 @@
-s! {
-    pub struct ctl_info {
-        pub ctl_id: u32,
-        pub ctl_name: [::c_char; MAX_KCTL_NAME],
-    }
-}
-
-pub const MAX_KCTL_NAME: usize = 96;
diff --git a/src/unix/bsd/apple/mod.rs b/src/unix/bsd/apple/mod.rs
index f8f888fa20666..a2c0319f1dc1b 100644
--- a/src/unix/bsd/apple/mod.rs
+++ b/src/unix/bsd/apple/mod.rs
@@ -1307,6 +1307,12 @@ s! {
         pub iffmid_id: u32,
         pub iffmid_str: [::c_char; 1],
     }
+
+    // kern_control.h
+    pub struct ctl_info {
+        pub ctl_id: u32,
+        pub ctl_name: [::c_char; MAX_KCTL_NAME],
+    }
 }
 
 s_no_extra_traits! {
@@ -5753,6 +5759,9 @@ pub const NETLINK_GENERIC: ::c_int = 0;
 pub const DOT3COMPLIANCE_STATS: ::c_int = 1;
 pub const DOT3COMPLIANCE_COLLS: ::c_int = 2;
 
+// kern_control.h
+pub const MAX_KCTL_NAME: usize = 96;
+
 f! {
     pub fn CMSG_NXTHDR(mhdr: *const ::msghdr,
                        cmsg: *const ::cmsghdr) -> *mut ::cmsghdr {
@@ -6825,10 +6834,3 @@ cfg_if! {
         // Unknown target_arch
     }
 }
-
-cfg_if! {
-    if #[cfg(libc_long_array)] {
-        mod long_array;
-        pub use self::long_array::*;
-    }
-}