diff --git a/src/doc/rustc-dev-guide/rust-version b/src/doc/rustc-dev-guide/rust-version
index d32b6d0d2fc7..7b444a9ef5f1 100644
--- a/src/doc/rustc-dev-guide/rust-version
+++ b/src/doc/rustc-dev-guide/rust-version
@@ -1 +1 @@
-7fefa09b90ca57b8a0e0e4717d672d38a0ae58b5
+85c8ff69cb3efd950395cc444a54bbbdad668865