diff --git a/resources/recipes/physics_world.recipe b/resources/recipes/physics_world.recipe
index 24e40cce78..0e3f408f6a 100644
--- a/resources/recipes/physics_world.recipe
+++ b/resources/recipes/physics_world.recipe
@@ -27,7 +27,7 @@ class PhysicsWorld(BasicNewsRecipe):
         br = BasicNewsRecipe.get_browser(self)
         if self.username is not None and self.password is not None:
             br.open('http://physicsworld.com/cws/sign-in')
-            br.select_form(nr=1)
+            br.select_form(nr=2)
             br['username'] = self.username
             br['password'] = self.password
             br.submit()