diff --git a/src/liballoc/boxed.rs b/src/liballoc/boxed.rs
index 76cf10f0d55ea..94f5f4042e134 100644
--- a/src/liballoc/boxed.rs
+++ b/src/liballoc/boxed.rs
@@ -726,14 +726,14 @@ impl<T: Clone> Clone for Box<[T]> {
     }
 }
 
-#[stable(feature = "rust1", since = "1.0.0")]
+#[stable(feature = "box_borrow", since = "1.1.0")]
 impl<T: ?Sized> borrow::Borrow<T> for Box<T> {
     fn borrow(&self) -> &T {
         &**self
     }
 }
 
-#[stable(feature = "rust1", since = "1.0.0")]
+#[stable(feature = "box_borrow", since = "1.1.0")]
 impl<T: ?Sized> borrow::BorrowMut<T> for Box<T> {
     fn borrow_mut(&mut self) -> &mut T {
         &mut **self
diff --git a/src/libcore/cell.rs b/src/libcore/cell.rs
index 1eebf67ad04cb..35744f3f16b39 100644
--- a/src/libcore/cell.rs
+++ b/src/libcore/cell.rs
@@ -942,7 +942,7 @@ impl<'b, T: ?Sized> Ref<'b, T> {
 #[unstable(feature = "coerce_unsized", issue = "27732")]
 impl<'b, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<Ref<'b, U>> for Ref<'b, T> {}
 
-#[stable(feature = "std_guard_impls", since = "1.20")]
+#[stable(feature = "std_guard_impls", since = "1.20.0")]
 impl<'a, T: ?Sized + fmt::Display> fmt::Display for Ref<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         self.value.fmt(f)
@@ -1041,7 +1041,7 @@ impl<'b, T: ?Sized> DerefMut for RefMut<'b, T> {
 #[unstable(feature = "coerce_unsized", issue = "27732")]
 impl<'b, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<RefMut<'b, U>> for RefMut<'b, T> {}
 
-#[stable(feature = "std_guard_impls", since = "1.20")]
+#[stable(feature = "std_guard_impls", since = "1.20.0")]
 impl<'a, T: ?Sized + fmt::Display> fmt::Display for RefMut<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         self.value.fmt(f)
diff --git a/src/libcore/char.rs b/src/libcore/char.rs
index 44f5fdbf4312b..bb4cb0ac3b215 100644
--- a/src/libcore/char.rs
+++ b/src/libcore/char.rs
@@ -210,7 +210,7 @@ impl From<u8> for char {
 
 
 /// An error which can be returned when parsing a char.
-#[stable(feature = "char_from_str", since = "1.19.0")]
+#[stable(feature = "char_from_str", since = "1.20.0")]
 #[derive(Clone, Debug)]
 pub struct ParseCharError {
     kind: CharErrorKind,
@@ -237,7 +237,7 @@ enum CharErrorKind {
     TooManyChars,
 }
 
-#[stable(feature = "char_from_str", since = "1.19.0")]
+#[stable(feature = "char_from_str", since = "1.20.0")]
 impl fmt::Display for ParseCharError {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         self.__description().fmt(f)
@@ -245,7 +245,7 @@ impl fmt::Display for ParseCharError {
 }
 
 
-#[stable(feature = "char_from_str", since = "1.19.0")]
+#[stable(feature = "char_from_str", since = "1.20.0")]
 impl FromStr for char {
     type Err = ParseCharError;
 
diff --git a/src/libstd/error.rs b/src/libstd/error.rs
index d77f817659c56..d1c2bfb96b336 100644
--- a/src/libstd/error.rs
+++ b/src/libstd/error.rs
@@ -340,7 +340,7 @@ impl Error for char::CharTryFromError {
     }
 }
 
-#[stable(feature = "char_from_str", since = "1.19.0")]
+#[stable(feature = "char_from_str", since = "1.20.0")]
 impl Error for char::ParseCharError {
     fn description(&self) -> &str {
         self.__description()
diff --git a/src/libstd/sync/mutex.rs b/src/libstd/sync/mutex.rs
index fc6c7de9ef083..62d8de18f4b45 100644
--- a/src/libstd/sync/mutex.rs
+++ b/src/libstd/sync/mutex.rs
@@ -440,7 +440,7 @@ impl<'a, T: ?Sized + fmt::Debug> fmt::Debug for MutexGuard<'a, T> {
     }
 }
 
-#[stable(feature = "std_guard_impls", since = "1.20")]
+#[stable(feature = "std_guard_impls", since = "1.20.0")]
 impl<'a, T: ?Sized + fmt::Display> fmt::Display for MutexGuard<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         (**self).fmt(f)
diff --git a/src/libstd/sync/rwlock.rs b/src/libstd/sync/rwlock.rs
index 944801e8a3bf0..5c5231f4e84a3 100644
--- a/src/libstd/sync/rwlock.rs
+++ b/src/libstd/sync/rwlock.rs
@@ -370,7 +370,7 @@ impl<'a, T: fmt::Debug> fmt::Debug for RwLockReadGuard<'a, T> {
     }
 }
 
-#[stable(feature = "std_guard_impls", since = "1.20")]
+#[stable(feature = "std_guard_impls", since = "1.20.0")]
 impl<'a, T: ?Sized + fmt::Display> fmt::Display for RwLockReadGuard<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         (**self).fmt(f)
@@ -386,7 +386,7 @@ impl<'a, T: fmt::Debug> fmt::Debug for RwLockWriteGuard<'a, T> {
     }
 }
 
-#[stable(feature = "std_guard_impls", since = "1.20")]
+#[stable(feature = "std_guard_impls", since = "1.20.0")]
 impl<'a, T: ?Sized + fmt::Display> fmt::Display for RwLockWriteGuard<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         (**self).fmt(f)
diff --git a/src/libstd_unicode/char.rs b/src/libstd_unicode/char.rs
index d4d8993efb316..d6836418b4b5c 100644
--- a/src/libstd_unicode/char.rs
+++ b/src/libstd_unicode/char.rs
@@ -38,7 +38,7 @@ use tables::{conversions, derived_property, general_category, property};
 pub use core::char::{MAX, from_digit, from_u32, from_u32_unchecked};
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::char::{EscapeDebug, EscapeDefault, EscapeUnicode};
-#[stable(feature = "char_from_str", since = "1.19.0")]
+#[stable(feature = "char_from_str", since = "1.20.0")]
 pub use core::char::ParseCharError;
 
 // unstable reexports