Fatal error: Call to undefined function entity_i18n_string()

I get this error when trying to view a node that has a field collection in it: Fatal error: Call to undefined function entity_i18n_string() in PATH/field_collection.module on line 869 (I replaced the actual path with PATH)
The error goes away when I disable the add/edit/delete links, i.e. choose format 'Fields only' under manage display of the node. I assume it will go away as well if you install i18n.