'#' character in column name causes ActiveModel error

I have an Oracle table which has the following column (legal in Oracle):

CASE# VARCHAR2(20)

Note the '#' character. I have this table mapped to a model class via ActiveRecord. This column name causes the following error whenever you try to use this model:

Failures:
1) Case should be valid with valid attributes

 Failure/Error: @case.save!
 /Users/bploetz/.rvm/gems/ruby-1.9.2-p0@sw-model/gems/activemodel-3.0.0/lib/active_model/attribute_methods.rb:273: syntax error, unexpected keyword_undef, expecting ')'
                     undef :case#?
                          ^
 /Users/bploetz/.rvm/gems/ruby-1.9.2-p0@sw-model/gems/activemodel-3.0.0/lib/active_model/attribute_methods.rb:274: syntax error, unexpected keyword_end, expecting $end

This comes from the following in active_model/attribute_methods.rb:

if method_defined?(:#{method_name})
undef :#{method_name} end

These evaluate to :case#, which is not a valid symbol.