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-rw-r--r--compiler/rustc_query_impl/src/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_query_impl/src/lib.rs b/compiler/rustc_query_impl/src/lib.rs
index 00e2f610752..55e95e1a592 100644
--- a/compiler/rustc_query_impl/src/lib.rs
+++ b/compiler/rustc_query_impl/src/lib.rs
@@ -15,6 +15,7 @@ extern crate rustc_macros;
 extern crate rustc_middle;
 
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
+use rustc_data_structures::sync::AtomicU64;
 use rustc_middle::arena::Arena;
 use rustc_middle::dep_graph::{self, DepKindStruct, SerializedDepNodeIndex};
 use rustc_middle::ty::query::{query_keys, query_storage, query_stored, query_values};