diff --git a/servo/ports/cef/README.md b/servo/ports/cef/README.md
index fe3057855dc8..ca7d1f265708 100644
--- a/servo/ports/cef/README.md
+++ b/servo/ports/cef/README.md
@@ -3,7 +3,7 @@ How to test:
 1. Go to http://cefbuilds.com/ and download a binary for your OS/arch
 2. Unpack the (huge) archive
 3. Create both Debug and Release build types for CEF (```./build.sh [Debug|Release]```)
-4. Build servo
+4. Build servo with ```./mach build-cef [--release]```
 5. Run a CEF-based executable with the embedding crate preloaded:
 	* Linux: ```LD_LIBRARY_PATH=/path/to/cef-bin-unpack-dir/out/$build_type LD_PRELOAD=/path/to/servo/build/libembedding-*.so [CEF EXE]```
 6. Enjoy CEF-powered crashes