diff --git a/acpid/src/main.rs b/acpid/src/main.rs
index c9276d6662..0b846b54b7 100644
--- a/acpid/src/main.rs
+++ b/acpid/src/main.rs
@@ -1,5 +1,3 @@
-#![feature(if_let_guard, int_roundings)]
-
 use std::convert::TryFrom;
 use std::fs::File;
 use std::mem;
diff --git a/audio/ihdad/src/main.rs b/audio/ihdad/src/main.rs
index 503cf23848..231b32e926 100755
--- a/audio/ihdad/src/main.rs
+++ b/audio/ihdad/src/main.rs
@@ -1,6 +1,3 @@
-//#![deny(warnings)]
-#![feature(int_roundings)]
-
 extern crate bitflags;
 extern crate event;
 extern crate spin;
diff --git a/common/src/lib.rs b/common/src/lib.rs
index 61fa6ced99..73ab361c37 100644
--- a/common/src/lib.rs
+++ b/common/src/lib.rs
@@ -2,7 +2,6 @@
 //!
 //! This includes direct memory access via [dma], and Scatter-Gather List support via [sgl].  It also
 //! provides various memory management structures for use with drivers, and some logging support.
-#![feature(int_roundings)]
 #![warn(missing_docs)]
 
 use libredox::call::MmapArgs;
diff --git a/graphics/fbbootlogd/src/main.rs b/graphics/fbbootlogd/src/main.rs
index 2168f2ed63..cd4d44ff07 100644
--- a/graphics/fbbootlogd/src/main.rs
+++ b/graphics/fbbootlogd/src/main.rs
@@ -9,8 +9,6 @@
 //!   to get new input. Fbbootlogd does all blocking operations in background threads such that the
 //!   main thread will always keep accepting new input and writing it to the framebuffer.
 
-#![feature(io_error_more)]
-
 use libredox::errno::EOPNOTSUPP;
 use redox_scheme::{RequestKind, Response, SignalBehavior, Socket};
 
diff --git a/graphics/fbcond/src/main.rs b/graphics/fbcond/src/main.rs
index bdaac9f33a..2b70ddc0ce 100644
--- a/graphics/fbcond/src/main.rs
+++ b/graphics/fbcond/src/main.rs
@@ -1,5 +1,3 @@
-#![feature(io_error_more)]
-
 use event::EventQueue;
 use libredox::errno::{EAGAIN, EINTR, EOPNOTSUPP, ESTALE};
 use orbclient::Event;
diff --git a/graphics/virtio-gpud/src/main.rs b/graphics/virtio-gpud/src/main.rs
index 880e80b9ab..8170c6f33b 100644
--- a/graphics/virtio-gpud/src/main.rs
+++ b/graphics/virtio-gpud/src/main.rs
@@ -20,8 +20,6 @@
 // cc https://docs.mesa3d.org/drivers/venus.html
 // cc https://docs.mesa3d.org/drivers/virgl.html
 
-#![feature(int_roundings)]
-
 use std::os::fd::AsRawFd;
 use std::sync::atomic::{AtomicU32, Ordering};
 
diff --git a/input/ps2d/src/main.rs b/input/ps2d/src/main.rs
index 186904cf9a..20f6b2d5f9 100644
--- a/input/ps2d/src/main.rs
+++ b/input/ps2d/src/main.rs
@@ -1,5 +1,3 @@
-#![feature(asm_const)]
-
 #[macro_use]
 extern crate bitflags;
 extern crate orbclient;
diff --git a/net/rtl8139d/src/main.rs b/net/rtl8139d/src/main.rs
index 774341b83d..37930b6187 100644
--- a/net/rtl8139d/src/main.rs
+++ b/net/rtl8139d/src/main.rs
@@ -1,5 +1,3 @@
-#![feature(int_roundings)]
-
 use std::convert::TryInto;
 use std::fs::File;
 use std::io::{Read, Write};
diff --git a/storage/ahcid/src/main.rs b/storage/ahcid/src/main.rs
index 0af3d33e7e..89467e04ce 100644
--- a/storage/ahcid/src/main.rs
+++ b/storage/ahcid/src/main.rs
@@ -1,5 +1,4 @@
 #![cfg_attr(target_arch = "aarch64", feature(stdsimd))] // Required for yield instruction
-#![feature(int_roundings)]
 
 extern crate byteorder;
 extern crate syscall;
diff --git a/storage/nvmed/src/main.rs b/storage/nvmed/src/main.rs
index 91b289a987..420f1e17e7 100644
--- a/storage/nvmed/src/main.rs
+++ b/storage/nvmed/src/main.rs
@@ -1,6 +1,5 @@
 #![cfg_attr(target_arch = "aarch64", feature(stdarch_arm_hints))] // Required for yield instruction
 #![cfg_attr(target_arch = "riscv64", feature(riscv_ext_intrinsics))] // Required for pause instruction
-#![feature(int_roundings)]
 
 use std::ptr::NonNull;
 use std::sync::Arc;
diff --git a/storage/virtio-blkd/src/main.rs b/storage/virtio-blkd/src/main.rs
index 14cec55197..2db8ab4779 100644
--- a/storage/virtio-blkd/src/main.rs
+++ b/storage/virtio-blkd/src/main.rs
@@ -1,5 +1,4 @@
 #![deny(trivial_numeric_casts, unused_allocation)]
-#![feature(int_roundings)]
 
 use std::sync::{Arc, Weak};
 
diff --git a/virtio-core/src/lib.rs b/virtio-core/src/lib.rs
index cc46d36ff8..2557d0b78e 100644
--- a/virtio-core/src/lib.rs
+++ b/virtio-core/src/lib.rs
@@ -1,5 +1,3 @@
-#![feature(int_roundings)]
-
 pub mod spec;
 pub mod transport;
 pub mod utils;