diff --git a/railties/lib/rails_generator/base.rb b/railties/lib/rails_generator/base.rb
index 752f54a2d4bc4955e34eb091e0142df0c19ba099..1ebcff906217302a14124f59a241343705030b04 100644
--- a/railties/lib/rails_generator/base.rb
+++ b/railties/lib/rails_generator/base.rb
@@ -230,6 +230,7 @@ def assign_names!(name)
           base_name, @class_path, @file_path, @class_nesting, @class_nesting_depth = extract_modules(@name)
           @class_name_without_nesting, @singular_name, @plural_name = inflect_names(base_name)
           @table_name = (!defined?(ActiveRecord::Base) || ActiveRecord::Base.pluralize_table_names) ? plural_name : singular_name
+          @table_name.gsub! '/', '_'
           if @class_nesting.empty?
             @class_name = @class_name_without_nesting
           else