1 files changed, 1 insertions, 0 deletions
diff --git a/lib/cgi/html.rb b/lib/cgi/html.rb
index d8dadb0e45..ba19e3d603 100644
--- a/lib/cgi/html.rb
+++ b/lib/cgi/html.rb
@@ -1033,6 +1033,7 @@ class CGI
     # Initialise the HTML generation methods for this version.
     def element_init
       extend TagMaker
+      return if defined?(html)
       methods = ""
       # - -
       for element in %w[ SECTION NAV ARTICLE ASIDE HGROUP HEADER