diff --git a/src/doc/rustc-dev-guide/rust-version b/src/doc/rustc-dev-guide/rust-version
index 876c32dcf434..651db7864b06 100644
--- a/src/doc/rustc-dev-guide/rust-version
+++ b/src/doc/rustc-dev-guide/rust-version
@@ -1 +1 @@
-dcfa38fe234de9304169afc6638e81d0dd222c06
+9c87288a7d2f03625a813df6d3bfe43c09ad4f5a