diff --git a/src/wp-includes/comment.php b/src/wp-includes/comment.php
index 87ed753c17..8648a89a0f 100644
--- a/src/wp-includes/comment.php
+++ b/src/wp-includes/comment.php
@@ -1912,7 +1912,7 @@ function wp_insert_comment( $commentdata ) {
 	$comment_karma    = ! isset( $data['comment_karma'] ) ? 0 : $data['comment_karma'];
 	$comment_approved = ! isset( $data['comment_approved'] ) ? 1 : $data['comment_approved'];
 	$comment_agent    = ! isset( $data['comment_agent'] ) ? '' : $data['comment_agent'];
-	$comment_type     = ! isset( $data['comment_type'] ) ? 'comment' : $data['comment_type'];
+	$comment_type     = empty( $data['comment_type'] ) ? 'comment' : $data['comment_type'];
 	$comment_parent   = ! isset( $data['comment_parent'] ) ? 0 : $data['comment_parent'];
 
 	$user_id = ! isset( $data['user_id'] ) ? 0 : $data['user_id'];
diff --git a/tests/phpunit/tests/comment-submission.php b/tests/phpunit/tests/comment-submission.php
index 6a5b845bb0..e2534ed2e8 100644
--- a/tests/phpunit/tests/comment-submission.php
+++ b/tests/phpunit/tests/comment-submission.php
@@ -715,6 +715,45 @@ class Tests_Comment_Submission extends WP_UnitTestCase {
 		$this->assertSame( $error, $comment->get_error_code() );
 	}
 
+	/**
+	 * @ticket 49236
+	 */
+	public function test_submitting_comment_with_empty_type_results_in_correct_type() {
+		$data    = array(
+			'comment_post_ID' => self::$post->ID,
+			'comment'         => 'Comment',
+			'author'          => 'Comment Author',
+			'email'           => 'comment@example.org',
+			'comment_type'    => '',
+		);
+		$comment = wp_handle_comment_submission( $data );
+
+		$this->assertNotWPError( $comment );
+		$this->assertInstanceOf( 'WP_Comment', $comment );
+
+		$this->assertSame( 'comment', $comment->comment_type );
+	}
+
+	/**
+	 * @ticket 49236
+	 */
+	public function test_inserting_comment_with_empty_type_results_in_correct_type() {
+		$data       = array(
+			'comment_post_ID' => self::$post->ID,
+			'comment'         => 'Comment',
+			'author'          => 'Comment Author',
+			'email'           => 'comment@example.org',
+			'comment_type'    => '',
+		);
+		$comment_id = wp_insert_comment( $data );
+		$comment    = get_comment( $comment_id );
+
+		$this->assertNotWPError( $comment );
+		$this->assertInstanceOf( 'WP_Comment', $comment );
+
+		$this->assertSame( 'comment', $comment->comment_type );
+	}
+
 	/**
 	 * @ticket 34997
 	 */