diff --git a/build.rs b/build.rs
index 88f4c5149035f..b8085901d561c 100644
--- a/build.rs
+++ b/build.rs
@@ -25,7 +25,6 @@ const ALLOWED_CFGS: &'static [&'static str] = &[
     "libc_long_array",
     "libc_non_exhaustive",
     "libc_packedN",
-    "libc_priv_mod_use",
     "libc_ptr_addr_of",
     "libc_thread_local",
     "libc_underscore_const_names",
@@ -99,11 +98,6 @@ fn main() {
         set_cfg("libc_deny_warnings");
     }
 
-    // Rust >= 1.15 supports private module use:
-    if rustc_minor_ver >= 15 || rustc_dep_of_std {
-        set_cfg("libc_priv_mod_use");
-    }
-
     // Rust >= 1.19 supports unions:
     if rustc_minor_ver >= 19 || rustc_dep_of_std {
         set_cfg("libc_union");
diff --git a/libc-test/build.rs b/libc-test/build.rs
index 8283d704ee4e6..2fbaef35a94b5 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -68,7 +68,6 @@ fn do_ctest() {
 fn ctest_cfg() -> ctest::TestGenerator {
     let mut cfg = ctest::TestGenerator::new();
     let libc_cfgs = [
-        "libc_priv_mod_use",
         "libc_union",
         "libc_const_size_of",
         "libc_align",
diff --git a/src/lib.rs b/src/lib.rs
index 893b46ff3ab28..ffeda95e8d505 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -43,52 +43,26 @@ cfg_if! {
     }
 }
 
-cfg_if! {
-    if #[cfg(libc_priv_mod_use)] {
-        #[cfg(libc_core_cvoid)]
-        #[allow(unused_imports)]
-        use core::ffi;
-        #[allow(unused_imports)]
-        use core::fmt;
-        #[allow(unused_imports)]
-        use core::hash;
-        #[allow(unused_imports)]
-        use core::num;
-        #[allow(unused_imports)]
-        use core::mem;
-        #[doc(hidden)]
-        #[allow(unused_imports)]
-        use core::clone::Clone;
-        #[doc(hidden)]
-        #[allow(unused_imports)]
-        use core::marker::{Copy, Send, Sync};
-        #[doc(hidden)]
-        #[allow(unused_imports)]
-        use core::option::Option;
-    } else {
-        #[doc(hidden)]
-        #[allow(unused_imports)]
-        pub use core::fmt;
-        #[doc(hidden)]
-        #[allow(unused_imports)]
-        pub use core::hash;
-        #[doc(hidden)]
-        #[allow(unused_imports)]
-        pub use core::num;
-        #[doc(hidden)]
-        #[allow(unused_imports)]
-        pub use core::mem;
-        #[doc(hidden)]
-        #[allow(unused_imports)]
-        pub use core::clone::Clone;
-        #[doc(hidden)]
-        #[allow(unused_imports)]
-        pub use core::marker::{Copy, Send, Sync};
-        #[doc(hidden)]
-        #[allow(unused_imports)]
-        pub use core::option::Option;
-    }
-}
+#[doc(hidden)]
+#[allow(unused_imports)]
+use core::clone::Clone;
+#[cfg(libc_core_cvoid)]
+#[allow(unused_imports)]
+use core::ffi;
+#[allow(unused_imports)]
+use core::fmt;
+#[allow(unused_imports)]
+use core::hash;
+#[doc(hidden)]
+#[allow(unused_imports)]
+use core::marker::{Copy, Send, Sync};
+#[allow(unused_imports)]
+use core::mem;
+#[allow(unused_imports)]
+use core::num;
+#[doc(hidden)]
+#[allow(unused_imports)]
+use core::option::Option;
 
 cfg_if! {
     if #[cfg(windows)] {