diff --git a/app/controllers/user_admin_controller.rb b/app/controllers/user_admin_controller.rb
--- a/app/controllers/user_admin_controller.rb
+++ b/app/controllers/user_admin_controller.rb
@@ -228,6 +228,7 @@
     end
   end
 
+
   # contest management
 
   def contests
@@ -423,6 +424,8 @@
       @action[:set_enable] = params[:enabled]
       @action[:enabled] = params[:enable] == "1"
       @action[:gen_password] = params[:gen_password]
+      @action[:add_group] = params[:add_group]
+      @action[:group_name] = params[:group_name]
     end
 
     if params[:commit] == "Perform"
@@ -437,6 +440,10 @@
           u.save
         end
       end
+      if @action[:add_group] and @action[:group_name]
+        @group = Group.find(@action[:group_name])
+        @users.each { |user|  @group.users << user }
+      end
     end
   end