diff --git a/README.md b/README.md
index 174ee7eb2ab..4553c22f873 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ changes. If you want to unbreak Servo against the latest Rust build,
 somebody in #servo or #rust will usually know what magic is required
 to fix the build.
 
-* Last known-good rust commit: 0e584f2e741ad5c6a1aefefe6eec3e2dd9fff518
+* Last known-good rust commit: 5558ebb6b7bf54a370111a46ea7c75b5becf85ec
 
 ### Prerequisites