diff --git a/src/liballoc/collections/btree/map.rs b/src/liballoc/collections/btree/map.rs
index 1683b810556..ddf012d1502 100644
--- a/src/liballoc/collections/btree/map.rs
+++ b/src/liballoc/collections/btree/map.rs
@@ -580,7 +580,6 @@ impl<K: Ord, V> BTreeMap<K, V> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(map_get_key_value)]
     /// use std::collections::BTreeMap;
     ///
     /// let mut map = BTreeMap::new();
@@ -588,7 +587,7 @@ impl<K: Ord, V> BTreeMap<K, V> {
     /// assert_eq!(map.get_key_value(&1), Some((&1, &"a")));
     /// assert_eq!(map.get_key_value(&2), None);
     /// ```
-    #[unstable(feature = "map_get_key_value", issue = "49347")]
+    #[stable(feature = "map_get_key_value", since = "1.40.0")]
     pub fn get_key_value<Q: ?Sized>(&self, k: &Q) -> Option<(&K, &V)>
         where K: Borrow<Q>,
               Q: Ord
diff --git a/src/libstd/collections/hash/map.rs b/src/libstd/collections/hash/map.rs
index a0538986a22..69abbde9e6e 100644
--- a/src/libstd/collections/hash/map.rs
+++ b/src/libstd/collections/hash/map.rs
@@ -714,7 +714,6 @@ where
     /// # Examples
     ///
     /// ```
-    /// #![feature(map_get_key_value)]
     /// use std::collections::HashMap;
     ///
     /// let mut map = HashMap::new();
@@ -722,7 +721,7 @@ where
     /// assert_eq!(map.get_key_value(&1), Some((&1, &"a")));
     /// assert_eq!(map.get_key_value(&2), None);
     /// ```
-    #[unstable(feature = "map_get_key_value", issue = "49347")]
+    #[stable(feature = "map_get_key_value", since = "1.40.0")]
     #[inline]
     pub fn get_key_value<Q: ?Sized>(&self, k: &Q) -> Option<(&K, &V)>
     where