diff --git a/src/liballoc/collections/btree/map.rs b/src/liballoc/collections/btree/map.rs
index 2fcc8cc98737d..88a8aa19b5718 100644
--- a/src/liballoc/collections/btree/map.rs
+++ b/src/liballoc/collections/btree/map.rs
@@ -488,7 +488,7 @@ struct MergeIter<K, V, I: Iterator<Item = (K, V)>> {
 }
 
 impl<K: Ord, V> BTreeMap<K, V> {
-    /// Makes a new empty BTreeMap with a reasonable choice for B.
+    /// Makes a new empty BTreeMap.
     ///
     /// # Examples
     ///