diff --git a/src/libcore/slice/mod.rs b/src/libcore/slice/mod.rs
index 07b45640a52..e7c8f5c88cd 100644
--- a/src/libcore/slice/mod.rs
+++ b/src/libcore/slice/mod.rs
@@ -2665,7 +2665,7 @@ impl<T> [T] {
     }
 
     /// Returns the index of the partition point according to the given predicate
-    // (the index of the first element of the second partition).
+    /// (the index of the first element of the second partition).
     ///
     /// The slice is assumed to be partitioned according to the given predicate.
     /// This means that all elements for which the predicate returns true are at the start of the slice