1 files changed, 4 insertions, 2 deletions
diff --git a/activesupport/lib/active_support/core_ext/string/output_safety.rb b/activesupport/lib/active_support/core_ext/string/output_safety.rb
index 9a7c520e75..5babc297c1 100644
--- a/activesupport/lib/active_support/core_ext/string/output_safety.rb
+++ b/activesupport/lib/active_support/core_ext/string/output_safety.rb
@@ -23,12 +23,14 @@ class ERB
       end
     end
 
-    undef :h
+    remove_method(:h)
     alias h html_escape
 
-    module_function :html_escape
     module_function :h
 
+    singleton_class.send(:remove_method, :html_escape)
+    module_function :html_escape
+
     # A utility method for escaping HTML entities in JSON strings.
     # This method is also aliased as <tt>j</tt>.
     #