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-rw-r--r--src/liballoc/lib.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/liballoc/lib.rs b/src/liballoc/lib.rs
index b1fdf139b0c..5c9a42a8a71 100644
--- a/src/liballoc/lib.rs
+++ b/src/liballoc/lib.rs
@@ -56,6 +56,8 @@
 //! The [`heap`](heap/index.html) module defines the low-level interface to the
 //! default global allocator. It is not compatible with the libc allocator API.
 
+// Do not remove on snapshot creation. Needed for bootstrap. (Issue #22364)
+#![cfg_attr(stage0, feature(custom_attribute))]
 #![crate_name = "alloc"]
 #![unstable(feature = "alloc")]
 #![feature(staged_api)]