diff --git a/src/doc/rustc-dev-guide/rust-version b/src/doc/rustc-dev-guide/rust-version
index e9fc6c4cd023..a428bf49dfdb 100644
--- a/src/doc/rustc-dev-guide/rust-version
+++ b/src/doc/rustc-dev-guide/rust-version
@@ -1 +1 @@
-e22c616e4e87914135c1db261a03e0437255335e
+d12e1e12ae6fb828df1b663a07c9191bc48c6d6d