2 files changed, 3 insertions, 4 deletions
diff --git a/src/libstd/thread/local.rs b/src/libstd/thread/local.rs
index 01584979aab..5166ddf8a21 100644
--- a/src/libstd/thread/local.rs
+++ b/src/libstd/thread/local.rs
@@ -99,7 +99,7 @@ pub struct LocalKey<T: 'static> {
     init: fn() -> T,
 }
 
-#[stable(feature = "std_debug", since = "1.15.0")]
+#[stable(feature = "std_debug", since = "1.16.0")]
 impl<T: 'static> fmt::Debug for LocalKey<T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.pad("LocalKey { .. }")
@@ -332,7 +332,6 @@ pub mod os {
         marker: marker::PhantomData<Cell<T>>,
     }
 
-    #[stable(feature = "std_debug", since = "1.15.0")]
     impl<T> fmt::Debug for Key<T> {
         fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
             f.pad("Key { .. }")
diff --git a/src/libstd/thread/mod.rs b/src/libstd/thread/mod.rs
index 8789006436c..93e320c4522 100644
--- a/src/libstd/thread/mod.rs
+++ b/src/libstd/thread/mod.rs
@@ -698,7 +698,7 @@ impl ThreadId {
     }
 }
 
-#[stable(feature = "std_debug", since = "1.15.0")]
+#[unstable(feature = "thread_id", issue = "21507")]
 impl fmt::Debug for ThreadId {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.pad("ThreadId { .. }")
@@ -1002,7 +1002,7 @@ impl<T> IntoInner<imp::Thread> for JoinHandle<T> {
     fn into_inner(self) -> imp::Thread { self.0.native.unwrap() }
 }
 
-#[stable(feature = "std_debug", since = "1.15.0")]
+#[stable(feature = "std_debug", since = "1.16.0")]
 impl<T> fmt::Debug for JoinHandle<T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.pad("JoinHandle { .. }")