diff --git a/src/libsyntax/tokenstream.rs b/src/libsyntax/tokenstream.rs
index 6de9a0fb0701f..eb99e549a7f6c 100644
--- a/src/libsyntax/tokenstream.rs
+++ b/src/libsyntax/tokenstream.rs
@@ -17,6 +17,7 @@ use crate::token::{self, DelimToken, Token, TokenKind};
 
 use syntax_pos::{Span, DUMMY_SP};
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
+use rustc_macros::HashStable_Generic;
 use rustc_data_structures::sync::Lrc;
 use smallvec::{SmallVec, smallvec};