diff --git a/src/libstd/sort.rs b/src/libstd/sort.rs
index 032b2ec3129..c8744f01662 100644
--- a/src/libstd/sort.rs
+++ b/src/libstd/sort.rs
@@ -430,7 +430,8 @@ impl<T: Ord> MergeState<T> {
             array[left] <-> self.tmp[0];
             start += 1;
         }
-        unsafe { vec::raw::set_len(&mut self.tmp, 0); } // Forget the boxed element
+        // Forget the boxed element
+        unsafe { vec::raw::set_len(&mut self.tmp, 0); }
         self.last_bsort = false;
     }