diff --git a/src/abi.rs b/src/abi.rs
index 5e041e6c6d3..92872a14359 100644
--- a/src/abi.rs
+++ b/src/abi.rs
@@ -379,6 +379,7 @@ fn local_place<'a, 'tcx: 'a>(
                 abi: _,
                 variants: _,
                 fields: _,
+                largest_niche: _,
             } = details;
             match place {
                 CPlace::Stack(stack_slot, _) => fx.add_entity_comment(
diff --git a/src/allocator.rs b/src/allocator.rs
index cfc071612e7..b3b2b53444d 100644
--- a/src/allocator.rs
+++ b/src/allocator.rs
@@ -10,8 +10,7 @@
 
 use crate::prelude::*;
 
-use rustc::middle::allocator::AllocatorKind;
-use rustc_allocator::{AllocatorTy, ALLOCATOR_METHODS};
+use syntax::ext::allocator::{AllocatorKind, AllocatorTy, ALLOCATOR_METHODS};
 
 /// Returns whether an allocator shim was created
 pub fn codegen(sess: &Session, module: &mut Module<impl Backend + 'static>) -> bool {
diff --git a/src/lib.rs b/src/lib.rs
index 8a4e79d544b..299b47403bc 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -3,7 +3,6 @@
 
 extern crate flate2;
 extern crate rustc;
-extern crate rustc_allocator;
 extern crate rustc_codegen_ssa;
 extern crate rustc_codegen_utils;
 extern crate rustc_data_structures;