diff --git a/src/libcollections/binary_heap.rs b/src/libcollections/binary_heap.rs
index 2988a6360955..188fd3f9d631 100644
--- a/src/libcollections/binary_heap.rs
+++ b/src/libcollections/binary_heap.rs
@@ -173,7 +173,7 @@ use vec::{self, Vec};
 /// ```
 /// use std::collections::BinaryHeap;
 ///
-/// // type inference lets us omit an explicit type signature (which
+/// // Type inference lets us omit an explicit type signature (which
 /// // would be `BinaryHeap<i32>` in this example).
 /// let mut heap = BinaryHeap::new();
 ///