diff --git a/src/wp-includes/comment.php b/src/wp-includes/comment.php
index d671597ed5..b30df85eda 100644
--- a/src/wp-includes/comment.php
+++ b/src/wp-includes/comment.php
@@ -2239,7 +2239,7 @@ function wp_update_comment($commentarr) {
 
 	$comment_ID = $data['comment_ID'];
 	$comment_post_ID = $data['comment_post_ID'];
-	$keys = array( 'comment_content', 'comment_author', 'comment_author_email', 'comment_approved', 'comment_karma', 'comment_author_url', 'comment_date', 'comment_date_gmt', 'comment_parent' );
+	$keys = array( 'comment_content', 'comment_author', 'comment_author_email', 'comment_approved', 'comment_karma', 'comment_author_url', 'comment_date', 'comment_date_gmt', 'comment_type', 'comment_parent' );
 	$data = wp_array_slice_assoc( $data, $keys );
 	$rval = $wpdb->update( $wpdb->comments, $data, compact( 'comment_ID' ) );
 
diff --git a/tests/phpunit/tests/comment.php b/tests/phpunit/tests/comment.php
index 6271696201..7514f90df3 100644
--- a/tests/phpunit/tests/comment.php
+++ b/tests/phpunit/tests/comment.php
@@ -15,6 +15,19 @@ class Tests_Comment extends WP_UnitTestCase {
 		$this->assertEquals( 0, $result );
 	}
 
+	/**
+	 * @ticket 30627
+	 */
+	function test_wp_update_comment_updates_comment_type() {
+		$post_id = $this->factory->post->create();
+		$comment_id = $this->factory->comment->create( array( 'comment_post_ID' => $post_id ) );
+
+		wp_update_comment( array( 'comment_ID' => $comment_id, 'comment_type' => 'pingback' ) );
+
+		$comment = get_comment( $comment_id );
+		$this->assertEquals( 'pingback', $comment->comment_type );
+	}
+
 	public function test_get_approved_comments() {
 		$p = $this->factory->post->create();
 		$ca1 = $this->factory->comment->create( array( 'comment_post_ID' => $p, 'comment_approved' => '1' ) );