diff --git a/src/libcore/macros.rs b/src/libcore/macros.rs
index c6b4433eb0a8..627ceade5cc1 100644
--- a/src/libcore/macros.rs
+++ b/src/libcore/macros.rs
@@ -618,7 +618,7 @@ macro_rules! unimplemented {
 /// }
 /// ```
 #[macro_export]
-#[stable(feature = "todo_macro", since = "1.37.0")]
+#[stable(feature = "todo_macro", since = "1.38.0")]
 macro_rules! todo {
     () => (panic!("not yet implemented"));
     ($($arg:tt)+) => (panic!("not yet implemented: {}", format_args!($($arg)*)));