diff --git a/components/canvas/lib.rs b/components/canvas/lib.rs
index cf865c2f163..d7ff9c30b04 100644
--- a/components/canvas/lib.rs
+++ b/components/canvas/lib.rs
@@ -2,6 +2,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+#![feature(clone_from_slice)]
 #![feature(nonzero)]
 #![feature(slice_bytes)]
 #![feature(plugin)]
diff --git a/components/canvas/webgl_paint_task.rs b/components/canvas/webgl_paint_task.rs
index f5cd8a87fab..6a79c967f26 100644
--- a/components/canvas/webgl_paint_task.rs
+++ b/components/canvas/webgl_paint_task.rs
@@ -13,7 +13,6 @@ use ipc_channel::router::ROUTER;
 use layers::platform::surface::NativeSurface;
 use offscreen_gl_context::{ColorAttachmentType, GLContext, GLContextAttributes};
 use std::borrow::ToOwned;
-use std::slice::bytes::copy_memory;
 use std::sync::mpsc::{Sender, channel};
 use util::task::spawn_named;
 use util::vec::byte_swap;
@@ -365,7 +364,7 @@ impl WebGLPaintTask {
             let dst_start = y * stride;
             let src_start = (height - y - 1) * stride;
             let src_slice = &orig_pixels[src_start .. src_start + stride];
-            copy_memory(&src_slice[..stride], &mut pixels[dst_start .. dst_start + stride]);
+            (&mut pixels[dst_start .. dst_start + stride]).clone_from_slice(&src_slice[..stride]);
         }
 
         // rgba -> bgra
diff --git a/components/compositing/compositor.rs b/components/compositing/compositor.rs
index 417f9072974..9548457039d 100644
--- a/components/compositing/compositor.rs
+++ b/components/compositing/compositor.rs
@@ -44,7 +44,6 @@ use std::collections::{HashMap, HashSet};
 use std::fs::File;
 use std::mem as std_mem;
 use std::rc::Rc;
-use std::slice::bytes::copy_memory;
 use std::sync::mpsc::Sender;
 use style_traits::viewport::ViewportConstraints;
 use surface_map::SurfaceMap;
@@ -1913,8 +1912,7 @@ impl<Window: WindowMethods> IOCompositor<Window> {
             let dst_start = y * stride;
             let src_start = (height - y - 1) * stride;
             let src_slice = &orig_pixels[src_start .. src_start + stride];
-            copy_memory(&src_slice[..stride],
-                        &mut pixels[dst_start .. dst_start + stride]);
+            (&mut pixels[dst_start .. dst_start + stride]).clone_from_slice(&src_slice[..stride]);
         }
         RgbImage::from_raw(width as u32, height as u32, pixels).unwrap()
     }
diff --git a/components/compositing/lib.rs b/components/compositing/lib.rs
index acc8f04c664..6bab532cc36 100644
--- a/components/compositing/lib.rs
+++ b/components/compositing/lib.rs
@@ -3,6 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #![feature(box_syntax)]
+#![feature(clone_from_slice)]
 #![feature(custom_derive)]
 #![feature(plugin)]
 #![feature(slice_bytes)]