diff --git a/src/doc/rustc-dev-guide/rust-version b/src/doc/rustc-dev-guide/rust-version
index 0dc9ce843e9c..47552aee08f7 100644
--- a/src/doc/rustc-dev-guide/rust-version
+++ b/src/doc/rustc-dev-guide/rust-version
@@ -1 +1 @@
-9f32ccf35fb877270bc44a86a126440f04d676d0
+4fa824bb78318a3cba8c7339d5754b4909922547