diff --git a/docs/src/heaps.md b/docs/src/heaps.md
index 6e823ca4..ef1b7d8a 100644
--- a/docs/src/heaps.md
+++ b/docs/src/heaps.md
@@ -76,7 +76,7 @@ original array, but sorts only by the data value:
 ```julia
 data = collect(enumerate(["foo", "bar", "baz"]))
 
-h1 = BinaryHeap(data) # Standard lexicographic ordering for tuples
+h1 = BinaryHeap(Base.Order.Forward, data) # Standard lexicographic ordering for tuples
 first(h1)             # => (1, "foo")
 
 h2 = BinaryHeap(Base.By(last), data) # Order by 2nd element only