diff --git a/src/libcore/char.rs b/src/libcore/char.rs
index e88c7695d1b418e48a6845b5eb39e7677c945394..1c5de09dd0cbca183f1a72119c359186e046bc81 100644
--- a/src/libcore/char.rs
+++ b/src/libcore/char.rs
@@ -63,6 +63,7 @@
 */
 
 /// The highest valid code point
+#[stable]
 pub const MAX: char = '\U0010ffff';
 
 /// Converts from `u32` to a `char`