diff --git a/lib/jekyll/document.rb b/lib/jekyll/document.rb
index f7eb9569..6fe63c34 100644
--- a/lib/jekyll/document.rb
+++ b/lib/jekyll/document.rb
@@ -232,6 +232,7 @@ module Jekyll
         Utils.deep_merge_hashes data, {
           "output"        => output,
           "content"       => content,
+          "relative_path" => relative_path,
           "path"          => relative_path,
           "url"           => url,
           "collection"    => collection.label