diff --git a/.travis.yml b/.travis.yml
index e725a80e0ba..224fc09c600 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -25,7 +25,7 @@ env:
     - LD_LIBRARY_PATH: /usr/local/lib
     - secure: "C/9/o+5KdTY1LZ4qZGE1+gY6mEGamG/VDHP69Om9dklfchJD6C+j8K8dvmE26FeRnLhSL7eGf1b3m6lfgkTZeVFjjiZE0Exvf1yI9Y3QPWR7ViaFxWk1z1I4HaSu4fpBo++e8FW+0EGjIkIrRtAn+bav3eDpAhgSih10KmAx4a8="
   matrix:
-    - TASKS=build,test-content,test-ref
+    - TASKS=build,build-cef,test-content,test-ref
 
 matrix:
   include:
@@ -33,5 +33,3 @@ matrix:
       env: TASKS=build,test-wpt1
     - os: osx
       env: TASKS=build,test-wpt2
-    - os: osx
-      env: TASKS=build-cef
diff --git a/ports/cef/Cargo.lock b/ports/cef/Cargo.lock
index af3f9ab0cb4..a3ed1159df2 100644
--- a/ports/cef/Cargo.lock
+++ b/ports/cef/Cargo.lock
@@ -10,7 +10,7 @@ dependencies = [
  "glfw 0.0.1 (git+https://github.com/servo/glfw-rs?ref=servo#a646f0badaccaebd61d0f8aaec5646da0a7c2a14)",
  "glut 0.0.1 (git+https://github.com/servo/rust-glut#d351eed425464c58671c6ec33445ee896fd42ff1)",
  "js 0.1.0 (git+https://github.com/servo/rust-mozjs#c9bd679428e8e83e585702a949d593bda8ac04d6)",
- "layers 0.1.0 (git+https://github.com/servo/rust-layers#b8a3eaf37cc3569e49fbc35ae891d816aaad7679)",
+ "layers 0.1.0 (git+https://github.com/servo/rust-layers#c04029907be1f2242d48235d3b03608b905bbd9f)",
  "macros 0.0.1",
  "msg 0.0.1",
  "net 0.0.1",
@@ -45,7 +45,7 @@ dependencies = [
  "freetype 0.1.0 (git+https://github.com/servo/rust-freetype#fb15dd309750c8ec664b2c9f245cfcb06731872e)",
  "geom 0.1.0 (git+https://github.com/servo/rust-geom#2982b770db6e5e3270305e0fd6b8068f6f80a489)",
  "glfw 0.0.1 (git+https://github.com/servo/glfw-rs?ref=servo#a646f0badaccaebd61d0f8aaec5646da0a7c2a14)",
- "layers 0.1.0 (git+https://github.com/servo/rust-layers#b8a3eaf37cc3569e49fbc35ae891d816aaad7679)",
+ "layers 0.1.0 (git+https://github.com/servo/rust-layers#c04029907be1f2242d48235d3b03608b905bbd9f)",
  "opengles 0.1.0 (git+https://github.com/servo/rust-opengles#13cccda11011716fd75526a74dfd03122110f95a)",
  "skia-sys 0.0.20130412 (git+https://github.com/servo/skia#6d696712962fd0d41120b7a414a48417da8e6a92)",
  "xlib 0.1.0 (git+https://github.com/servo/rust-xlib#79904fb42ff8a0e888f70fae336fbf6c11f1e6c8)",
@@ -76,7 +76,7 @@ dependencies = [
  "gfx 0.0.1",
  "glfw 0.0.1 (git+https://github.com/servo/glfw-rs?ref=servo#a646f0badaccaebd61d0f8aaec5646da0a7c2a14)",
  "glut 0.0.1 (git+https://github.com/servo/rust-glut#d351eed425464c58671c6ec33445ee896fd42ff1)",
- "layers 0.1.0 (git+https://github.com/servo/rust-layers#b8a3eaf37cc3569e49fbc35ae891d816aaad7679)",
+ "layers 0.1.0 (git+https://github.com/servo/rust-layers#c04029907be1f2242d48235d3b03608b905bbd9f)",
  "layout_traits 0.0.1",
  "msg 0.0.1",
  "net 0.0.1",
@@ -176,7 +176,7 @@ dependencies = [
  "freetype 0.1.0 (git+https://github.com/servo/rust-freetype#fb15dd309750c8ec664b2c9f245cfcb06731872e)",
  "geom 0.1.0 (git+https://github.com/servo/rust-geom#2982b770db6e5e3270305e0fd6b8068f6f80a489)",
  "harfbuzz 0.1.0 (git+https://github.com/servo/rust-harfbuzz#f07c6ae3111a94945f0f04b5f0d7c4e7c20958e9)",
- "layers 0.1.0 (git+https://github.com/servo/rust-layers#b8a3eaf37cc3569e49fbc35ae891d816aaad7679)",
+ "layers 0.1.0 (git+https://github.com/servo/rust-layers#c04029907be1f2242d48235d3b03608b905bbd9f)",
  "macros 0.0.1",
  "msg 0.0.1",
  "net 0.0.1",
@@ -255,7 +255,7 @@ dependencies = [
 [[package]]
 name = "layers"
 version = "0.1.0"
-source = "git+https://github.com/servo/rust-layers#b8a3eaf37cc3569e49fbc35ae891d816aaad7679"
+source = "git+https://github.com/servo/rust-layers#c04029907be1f2242d48235d3b03608b905bbd9f"
 dependencies = [
  "core_foundation 0.1.0 (git+https://github.com/servo/rust-core-foundation#9aeaee0bceb3241d6efca07cc6b82747339ffbff)",
  "egl 0.1.0 (git+https://github.com/servo/rust-egl#48b85e30d557ab2ee536730a73dd86a8160d618b)",
@@ -314,7 +314,7 @@ dependencies = [
  "core_foundation 0.1.0 (git+https://github.com/servo/rust-core-foundation#9aeaee0bceb3241d6efca07cc6b82747339ffbff)",
  "geom 0.1.0 (git+https://github.com/servo/rust-geom#2982b770db6e5e3270305e0fd6b8068f6f80a489)",
  "io_surface 0.1.0 (git+https://github.com/servo/rust-io-surface#05f102273e16e9432245f813e5fe6280087e2b44)",
- "layers 0.1.0 (git+https://github.com/servo/rust-layers#b8a3eaf37cc3569e49fbc35ae891d816aaad7679)",
+ "layers 0.1.0 (git+https://github.com/servo/rust-layers#c04029907be1f2242d48235d3b03608b905bbd9f)",
  "url 0.1.0 (git+https://github.com/servo/rust-url#678bb4d52638b1cfdab78ef8e521566c9240fb1a)",
  "util 0.0.1",
 ]
diff --git a/ports/cef/mem.rs b/ports/cef/mem.rs
index 749a1439df7..76a0cde499f 100644
--- a/ports/cef/mem.rs
+++ b/ports/cef/mem.rs
@@ -6,7 +6,11 @@ use libc::{c_void, size_t};
 use std::mem;
 use std::ptr::set_memory;
 
+// -U _tc_* needed on OS X, but won't work on other platforms
+#[cfg(target_os="macos")]
 #[link_args="-Wl,-U,_tc_new -Wl,-U,_tc_newarray -Wl,-U,_tc_delete -Wl,-U,_tc_deletearray"]
+extern {}
+
 extern "C" {
     fn tc_new(size: size_t) -> *mut c_void;
     fn tc_delete(mem: *mut c_void);