Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for modifying search results. In one aspect, a method includes receiving data that specify a set of responsive resources for a search request that was submitted by a user device. A determination is made that a resource request for a particular resource from the set of responsive resources will cause the user device to be redirected to a different resource than the particular resource. In response to the determination a reference to the different resource is inserted into a search result for the particular resource. The search result for the particular resource is provided to the user device, where the search result includes the reference to the different resource.