diff --git a/servo/components/servo/Cargo.lock b/servo/components/servo/Cargo.lock
index abf404d4cbff..1efd7d91ba97 100644
--- a/servo/components/servo/Cargo.lock
+++ b/servo/components/servo/Cargo.lock
@@ -840,6 +840,7 @@ dependencies = [
  "geom 0.1.0 (git+https://github.com/servo/rust-geom)",
  "layers 0.1.0 (git+https://github.com/servo/rust-layers)",
  "lazy_static 0.1.7 (git+https://github.com/Kimundi/lazy-static.rs)",
+ "libc 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "plugins 0.0.1",
  "rand 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/servo/components/util/Cargo.toml b/servo/components/util/Cargo.toml
index dceb222f4579..1ce8a3969420 100644
--- a/servo/components/util/Cargo.toml
+++ b/servo/components/util/Cargo.toml
@@ -46,3 +46,4 @@ time = "0.1.12"
 bitflags = "*"
 rand = "*"
 rustc-serialize = "0.2"
+libc = "*"
diff --git a/servo/components/util/lib.rs b/servo/components/util/lib.rs
index ab197869cf8f..b6c1f938e66f 100644
--- a/servo/components/util/lib.rs
+++ b/servo/components/util/lib.rs
@@ -10,7 +10,6 @@
 #![feature(hash)]
 #![feature(int_uint)]
 #![feature(io)]
-#![feature(libc)]
 #![feature(optin_builtin_traits)]
 #![feature(path)]
 #![feature(plugin)]
diff --git a/servo/ports/cef/Cargo.lock b/servo/ports/cef/Cargo.lock
index d8f08c7fbdc1..10937d19430c 100644
--- a/servo/ports/cef/Cargo.lock
+++ b/servo/ports/cef/Cargo.lock
@@ -867,6 +867,7 @@ dependencies = [
  "geom 0.1.0 (git+https://github.com/servo/rust-geom)",
  "layers 0.1.0 (git+https://github.com/servo/rust-layers)",
  "lazy_static 0.1.7 (git+https://github.com/Kimundi/lazy-static.rs)",
+ "libc 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "plugins 0.0.1",
  "rand 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/servo/ports/gonk/Cargo.lock b/servo/ports/gonk/Cargo.lock
index 4190fd31474a..dbf9980a7931 100644
--- a/servo/ports/gonk/Cargo.lock
+++ b/servo/ports/gonk/Cargo.lock
@@ -765,6 +765,7 @@ dependencies = [
  "geom 0.1.0 (git+https://github.com/servo/rust-geom)",
  "layers 0.1.0 (git+https://github.com/servo/rust-layers)",
  "lazy_static 0.1.7 (git+https://github.com/Kimundi/lazy-static.rs)",
+ "libc 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "plugins 0.0.1",
  "rand 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",