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-rw-r--r--compiler/rustc_attr_parsing/src/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_attr_parsing/src/lib.rs b/compiler/rustc_attr_parsing/src/lib.rs
index 4dd908cdc40..f51cc8c4e8b 100644
--- a/compiler/rustc_attr_parsing/src/lib.rs
+++ b/compiler/rustc_attr_parsing/src/lib.rs
@@ -79,6 +79,7 @@
 // tidy-alphabetical-start
 #![allow(internal_features)]
 #![doc(rust_logo)]
+#![feature(decl_macro)]
 #![feature(rustdoc_internals)]
 #![recursion_limit = "256"]
 // tidy-alphabetical-end