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
@@ -209,7 +209,7 @@
     @prefix = params[:prefix] || ''
     @non_admin_users = User.find_non_admin_with_prefix(@prefix)
     @changed = false
-    if request.request_method == 'POST'
+    if params[:commit] == 'Go ahead'
       @non_admin_users.each do |user|
         password = random_password
         user.password = password
@@ -220,7 +220,6 @@
     end
   end
 
-
   # contest management
 
   def contests