diff --git a/wp-includes/link-template.php b/wp-includes/link-template.php
index 268cbed74..b0331da14 100644
--- a/wp-includes/link-template.php
+++ b/wp-includes/link-template.php
@@ -956,7 +956,7 @@ function get_adjacent_post($in_same_cat = false, $excluded_categories = '', $pre
 	$order = $previous ? 'DESC' : 'ASC';
 
 	$join  = apply_filters( "get_{$adjacent}_post_join", $join, $in_same_cat, $excluded_categories );
-	$where = apply_filters( "get_{$adjacent}_post_where", $wpdb->prepare("WHERE p.post_date $op %s AND p.post_type = 'post' AND p.post_status = 'publish' $posts_in_ex_cats_sql", $current_post_date), $in_same_cat, $excluded_categories );
+	$where = apply_filters( "get_{$adjacent}_post_where", $wpdb->prepare("WHERE p.post_date $op %s AND p.post_type = %s AND p.post_status = 'publish' $posts_in_ex_cats_sql", $current_post_date, $post->post_type), $in_same_cat, $excluded_categories );
 	$sort  = apply_filters( "get_{$adjacent}_post_sort", "ORDER BY p.post_date $order LIMIT 1" );
 
 	$query = "SELECT p.* FROM $wpdb->posts AS p $join $where $sort";