diff --git a/components/style/Cargo.toml b/components/style/Cargo.toml
index 71898ea32e0..d0e5daddb04 100644
--- a/components/style/Cargo.toml
+++ b/components/style/Cargo.toml
@@ -31,7 +31,6 @@ gecko_bindings = {path = "../../ports/geckolib/gecko_bindings", optional = true}
 heapsize = {version = "0.3.0", optional = true}
 heapsize_plugin = {version = "0.1.2", optional = true}
 lazy_static = "0.2"
-libc = "0.2"
 log = "0.3.5"
 matches = "0.1"
 num-traits = "0.1.32"
@@ -51,5 +50,8 @@ plugins = {path = "../plugins", optional = true}
 [target.'cfg(windows)'.dependencies]
 kernel32-sys = "0.2"
 
+[target.'cfg(not(windows))'.dependencies]
+libc = "0.2"
+
 [build-dependencies]
 walkdir = "0.1"
diff --git a/components/style/lib.rs b/components/style/lib.rs
index 1ad47061062..aa1f91b6c83 100644
--- a/components/style/lib.rs
+++ b/components/style/lib.rs
@@ -51,7 +51,6 @@ extern crate gecko_bindings;
 #[allow(unused_extern_crates)]
 #[macro_use]
 extern crate lazy_static;
-extern crate libc;
 #[macro_use]
 extern crate log;
 #[allow(unused_extern_crates)]
diff --git a/components/style/workqueue.rs b/components/style/workqueue.rs
index acee9faf5f8..0d2da58e93d 100644
--- a/components/style/workqueue.rs
+++ b/components/style/workqueue.rs
@@ -11,10 +11,10 @@
 
 #[cfg(windows)]
 extern crate kernel32;
+#[cfg(not(windows))]
+extern crate libc;
 
 use deque::{self, Abort, Data, Empty, Stealer, Worker};
-#[cfg(not(windows))]
-use libc::usleep;
 use rand::{Rng, XorShiftRng, weak_rng};
 use std::sync::atomic::{AtomicUsize, Ordering};
 use std::sync::mpsc::{Receiver, Sender, channel};
@@ -90,7 +90,7 @@ const BACKOFFS_UNTIL_CONTROL_CHECK: u32 = 6;
 #[cfg(not(windows))]
 fn sleep_microseconds(usec: u32) {
     unsafe {
-        usleep(usec);
+        libc::usleep(usec);
     }
 }