diff --git a/lib/pg_search/features/tsearch.rb b/lib/pg_search/features/tsearch.rb
index ddac82e7..8b41dcd2 100644
--- a/lib/pg_search/features/tsearch.rb
+++ b/lib/pg_search/features/tsearch.rb
@@ -47,7 +47,7 @@ def checks_for_highlight
       end
 
       def ts_headline
-        "ts_headline((#{document}), (#{tsquery}), '#{ts_headline_options}')"
+        "ts_headline(#{dictionary.to_sql}, (#{document}), (#{tsquery}), '#{ts_headline_options}')"
       end
 
       def ts_headline_options