diff --git a/rust-version b/rust-version
index f1a0bf19e34b..f28fce1af27c 100644
--- a/rust-version
+++ b/rust-version
@@ -1 +1 @@
-04e7f96dd89b1f0ad615dff1c85d11d4c4c64cb4
+d9051341a1c142542a3f7dab509266606c775382
diff --git a/src/lib.rs b/src/lib.rs
index 10dfc32b0f78..f62f9a850d15 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -8,7 +8,7 @@
 extern crate log;
 // From rustc.
 extern crate rustc_apfloat;
-extern crate syntax;
+extern crate rustc_ast;
 #[macro_use]
 extern crate rustc;
 extern crate rustc_hir;
diff --git a/src/machine.rs b/src/machine.rs
index ec4c69159c6e..f90c8b82e64f 100644
--- a/src/machine.rs
+++ b/src/machine.rs
@@ -16,7 +16,7 @@ use rustc::ty::{
     Ty, TyCtxt,
 };
 use rustc_span::{source_map::Span, symbol::sym};
-use syntax::attr;
+use rustc_ast::attr;
 
 use crate::*;
 
diff --git a/src/shims/foreign_items.rs b/src/shims/foreign_items.rs
index 3d8d3bd52607..f8b42e509133 100644
--- a/src/shims/foreign_items.rs
+++ b/src/shims/foreign_items.rs
@@ -9,7 +9,7 @@ use rustc::ty;
 use rustc::ty::layout::{Align, Size};
 use rustc_apfloat::Float;
 use rustc_span::symbol::sym;
-use syntax::attr;
+use rustc_ast::attr;
 
 use crate::*;