Warning emd_builtin_posts_where() expected to be a reference

Encountered this upon installing the plugin today:

Warning: Parameter 2 to emd_builtin_posts_where() expected to be a reference, value given in wp-includes/class-wp-hook.php on line 298 Warning: Parameter 2 to emd_builtin_posts_where() expected to be a reference, value given in wp-includes/class-wp-hook.php on line 298 Warning: Parameter 2 to emd_builtin_posts_where() expected to be a reference, value given in wp-includes/class-wp-hook.php on line 298 Warning: Parameter 2 to emd_builtin_posts_where() expected to be a reference, value given in wp-includes/class-wp-hook.php on line 298 Warning: Parameter 2 to emd_builtin_posts_where() expected to be a reference, value given in wp-includes/class-wp-hook.php on line 298 Warning: Parameter 2 to emd_builtin_posts_where() expected to be a reference, value given in wp-includes/class-wp-hook.php on line 298

The server is running php 7.1, WordPress version 4.7.3, all other plugins and themes are up to date.