Invalid argument supplied for foreach() line 54

location_map_link_us

warning: Invalid argument supplied for foreach() in /path/to/drupal/sites/all/modules/location/location.inc on line 54.

The code looks like this:

$selected_providers = variable_get('location_map_link_'. $location['country'], function_exists($default_func) ? $default_func() : array());

$links = array();
foreach ($selected_providers as $mapper) {

On my site, it's looking for the variable location_map_link_us, but that variable contains a string instead of an array, so I'm getting the above error.