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-rw-r--r--src/libcore/prelude/mod.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libcore/prelude/mod.rs b/src/libcore/prelude/mod.rs
index b6c93615378..99b1947c84e 100644
--- a/src/libcore/prelude/mod.rs
+++ b/src/libcore/prelude/mod.rs
@@ -10,4 +10,6 @@
 
 //! The libcore prelude
 
+#![stable(feature = "core_prelude", since = "1.4.0")]
+
 pub mod v1;