diff --git a/components/compositing/constellation.rs b/components/compositing/constellation.rs
index 62025de4c51..69a02ad05e6 100644
--- a/components/compositing/constellation.rs
+++ b/components/compositing/constellation.rs
@@ -26,7 +26,9 @@ use gaol;
 use gaol::sandbox::{self, Sandbox, SandboxMethods};
 use gfx::font_cache_thread::FontCacheThread;
 use gfx_traits::Epoch;
-use ipc_channel::ipc::{self, IpcOneShotServer, IpcSender};
+#[cfg(not(target_os = "windows"))]
+use ipc_channel::ipc::IpcOneShotServer;
+use ipc_channel::ipc::{self, IpcSender};
 use ipc_channel::router::ROUTER;
 use layout_traits::{LayoutControlChan, LayoutThreadFactory};
 use msg::constellation_msg::WebDriverCommandMsg;
@@ -54,6 +56,7 @@ use script_traits::{LayoutMsg as FromLayoutMsg, ScriptMsg as FromScriptMsg, Scri
 use script_traits::{MozBrowserEvent, MozBrowserErrorType};
 use std::borrow::ToOwned;
 use std::collections::HashMap;
+#[cfg(not(target_os = "windows"))]
 use std::env;
 use std::io::Error as IOError;
 use std::marker::PhantomData;
@@ -179,6 +182,7 @@ pub struct Constellation<LTF, STF> {
     scheduler_chan: IpcSender<TimerEventRequest>,
 
     /// A list of child content processes.
+    #[cfg_attr(target_os = "windows", allow(dead_code))]
     child_processes: Vec<ChildProcess>,
 
     /// Document states for loaded pipelines (used only when writing screenshots).
@@ -317,8 +321,9 @@ enum ExitPipelineMode {
 }
 
 enum ChildProcess {
-#[cfg(not(target_os = "windows"))]
+    #[cfg(not(target_os = "windows"))]
     Sandboxed(gaol::platform::process::Process),
+    #[cfg(not(target_os = "windows"))]
     Unsandboxed(process::Child),
 }
 
diff --git a/components/profile/lib.rs b/components/profile/lib.rs
index da2d03c0a8d..eaea167644d 100644
--- a/components/profile/lib.rs
+++ b/components/profile/lib.rs
@@ -2,7 +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(alloc_jemalloc)]
+#![cfg_attr(not(target_os = "windows"), feature(alloc_jemalloc))]
 #![feature(box_syntax)]
 #![feature(iter_arith)]
 #![feature(plugin)]
diff --git a/components/profile/mem.rs b/components/profile/mem.rs
index b82b5672d6d..75cb8cf0f38 100644
--- a/components/profile/mem.rs
+++ b/components/profile/mem.rs
@@ -356,10 +356,14 @@ impl ReportsForest {
 //---------------------------------------------------------------------------
 
 mod system_reporter {
+    #[cfg(not(target_os = "windows"))]
     use libc::{c_char, c_int, c_void, size_t};
     use profile_traits::mem::{Report, ReportKind, ReporterRequest};
+    #[cfg(not(target_os = "windows"))]
     use std::ffi::CString;
+    #[cfg(not(target_os = "windows"))]
     use std::mem::size_of;
+    #[cfg(not(target_os = "windows"))]
     use std::ptr::null_mut;
     use super::{JEMALLOC_HEAP_ALLOCATED_STR, SYSTEM_HEAP_ALLOCATED_STR};
     #[cfg(target_os = "macos")]
@@ -456,6 +460,7 @@ mod system_reporter {
         None
     }
 
+    #[cfg(not(target_os = "windows"))]
     extern {
         #[cfg_attr(any(target_os = "macos", target_os = "android"), link_name = "je_mallctl")]
         fn mallctl(name: *const c_char, oldp: *mut c_void, oldlenp: *mut size_t,
@@ -499,7 +504,7 @@ mod system_reporter {
     }
 
     #[cfg(target_os = "windows")]
-    fn jemalloc_stat(value_name: &str) -> Option<usize> {
+    fn jemalloc_stat(_value_name: &str) -> Option<usize> {
         None
     }