diff --git a/src/wp-includes/comment.php b/src/wp-includes/comment.php
index 5d87da2890..0d03a11758 100644
--- a/src/wp-includes/comment.php
+++ b/src/wp-includes/comment.php
@@ -3336,7 +3336,7 @@ function _prime_comment_caches( $comment_ids, $update_meta_cache = true ) {
 
 	$non_cached_ids = _get_non_cached_ids( $comment_ids, 'comment' );
 	if ( ! empty( $non_cached_ids ) ) {
-		$fresh_comments = $wpdb->get_results( sprintf( "SELECT $wpdb->comments.* FROM $wpdb->comments WHERE comment_ID IN (%s)", implode( ',', array_map( 'intval', $non_cached_ids ) ) ) );
+		$fresh_comments = $wpdb->get_results( $wpdb->prepare( "SELECT $wpdb->comments.* FROM $wpdb->comments WHERE comment_ID IN (%s)", implode( ',', array_map( 'intval', $non_cached_ids ) ) ) );
 
 		update_comment_cache( $fresh_comments, false );
 	}