diff --git a/wp-includes/class-wp-xmlrpc-server.php b/wp-includes/class-wp-xmlrpc-server.php
index 1a16d8cbf3..7bc370e31a 100644
--- a/wp-includes/class-wp-xmlrpc-server.php
+++ b/wp-includes/class-wp-xmlrpc-server.php
@@ -3553,8 +3553,14 @@ class wp_xmlrpc_server extends IXR_Server {
 			return new IXR_Error( 403, __( 'Sorry, comments are closed for this item.' ) );
 		}
 
-		$comment = array();
-		$comment['comment_post_ID'] = $post_id;
+		if ( empty( $content_struct['content'] ) ) {
+			return new IXR_Error( 403, __( 'Comment is required.' ) );
+		}
+
+		$comment = array(
+			'comment_post_ID' => $post_id,
+			'comment_content' => $content_struct['content'],
+		);
 
 		if ( $logged_in ) {
 			$display_name = $user->display_name;
@@ -3590,12 +3596,17 @@ class wp_xmlrpc_server extends IXR_Server {
 
 		$comment['comment_parent'] = isset($content_struct['comment_parent']) ? absint($content_struct['comment_parent']) : 0;
 
-		$comment['comment_content'] =  isset($content_struct['content']) ? $content_struct['content'] : null;
-
 		/** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
 		do_action( 'xmlrpc_call', 'wp.newComment' );
 
-		$comment_ID = wp_new_comment( $comment );
+		$comment_ID = wp_new_comment( $comment, true );
+		if ( is_wp_error( $comment_ID ) ) {
+			return new IXR_Error( 403, $comment_ID->get_error_message() );
+		}
+
+		if ( ! $comment_ID ) {
+			return new IXR_Error( 403, __( 'An unknown error occurred' ) );
+		}
 
 		/**
 		 * Fires after a new comment has been successfully created via XML-RPC.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 7e85c37cd9..7a8e3b2bc3 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-beta1-39044';
+$wp_version = '4.7-beta1-39045';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.