diff --git a/src/arch/common.rs b/src/arch/common.rs
index 8207806..48c4f98 100644
--- a/src/arch/common.rs
+++ b/src/arch/common.rs
@@ -1,7 +1,6 @@
 // This file is part of libfringe, a low-level green threading library.
 // Copyright (c) 2015, edef <edef@edef.eu>
 // See the LICENSE file included in this distribution.
-use core::prelude::*;
 use core::mem::{size_of, align_of};
 use core::cmp::max;
 use core::ptr;
diff --git a/src/arch/mod.rs b/src/arch/mod.rs
index 7baca42..d85e3b4 100644
--- a/src/arch/mod.rs
+++ b/src/arch/mod.rs
@@ -1,7 +1,6 @@
 // This file is part of libfringe, a low-level green threading library.
 // Copyright (c) 2015, edef <edef@edef.eu>
 // See the LICENSE file included in this distribution.
-use core::prelude::*;
 pub use self::imp::Registers;
 
 unsafe impl Send for Registers {}
diff --git a/src/arch/x86_64/mod.rs b/src/arch/x86_64/mod.rs
index 26b674d..3c7e8b5 100644
--- a/src/arch/x86_64/mod.rs
+++ b/src/arch/x86_64/mod.rs
@@ -1,8 +1,6 @@
 // This file is part of libfringe, a low-level green threading library.
 // Copyright (c) 2015, edef <edef@edef.eu>
 // See the LICENSE file included in this distribution.
-use core::prelude::*;
-
 use stack::Stack;
 use super::common::{push, rust_trampoline};
 
diff --git a/src/context.rs b/src/context.rs
index c66cda6..955915b 100644
--- a/src/context.rs
+++ b/src/context.rs
@@ -1,7 +1,6 @@
 // This file is part of libfringe, a low-level green threading library.
 // Copyright (c) 2015, edef <edef@edef.eu>
 // See the LICENSE file included in this distribution.
-use core::prelude::*;
 use core::marker::PhantomData;
 use arch::Registers;
 use stack;
diff --git a/src/debug/mod.rs b/src/debug/mod.rs
index 5f0affe..46540ba 100644
--- a/src/debug/mod.rs
+++ b/src/debug/mod.rs
@@ -1,7 +1,6 @@
 // This file is part of libfringe, a low-level green threading library.
 // Copyright (c) 2015, edef <edef@edef.eu>
 // See the LICENSE file included in this distribution.
-use core::prelude::*;
 use stack;
 
 mod valgrind;
diff --git a/src/lib.rs b/src/lib.rs
index 252a6cb..bb1c9f3 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,15 +2,12 @@
 // Copyright (c) 2015, edef <edef@edef.eu>
 // See the LICENSE file included in this distribution.
 #![feature(no_std)]
-#![feature(asm, core, core_prelude)]
+#![feature(asm, core)]
 #![no_std]
 
 //! libfringe is a low-level green threading library.
 //! It provides only a context-swapping mechanism.
 
-#[macro_use]
-extern crate core;
-
 #[cfg(test)]
 #[macro_use]
 extern crate std;
diff --git a/src/os/mod.rs b/src/os/mod.rs
index 5935726..38f577b 100644
--- a/src/os/mod.rs
+++ b/src/os/mod.rs
@@ -3,7 +3,6 @@
 // See the LICENSE file included in this distribution.
 
 extern crate std;
-use core::prelude::*;
 use self::std::io::Error as IoError;
 use stack;
 mod sys;
diff --git a/src/os/sys/unix.rs b/src/os/sys/unix.rs
index cd26b50..c3d3b64 100644
--- a/src/os/sys/unix.rs
+++ b/src/os/sys/unix.rs
@@ -2,7 +2,6 @@
 // Copyright (c) 2015, edef <edef@edef.eu>
 // See the LICENSE file included in this distribution.
 extern crate libc;
-use core::prelude::*;
 use self::libc::{c_void, c_int, size_t};
 use self::libc::{mmap, mprotect, munmap};
 use self::libc::MAP_FAILED;