diff --git a/plugin-update-checker.php b/plugin-update-checker.php
index 2a73d54..f22016f 100644
--- a/plugin-update-checker.php
+++ b/plugin-update-checker.php
@@ -8,17 +8,17 @@
  * http://www.gnu.org/licenses/gpl.html
  */
 
-if ( !class_exists('PluginUpdateChecker_1_5') ):
+if ( !class_exists('PluginUpdateChecker_1_6') ):
 
 /**
  * A custom plugin update checker. 
  * 
  * @author Janis Elsts
  * @copyright 2014
- * @version 1.5
+ * @version 1.6
  * @access public
  */
-class PluginUpdateChecker_1_5 {
+class PluginUpdateChecker_1_6 {
 	public $metadataUrl = ''; //The URL of the plugin's metadata file.
 	public $pluginAbsolutePath = ''; //Full path of the main plugin file.
 	public $pluginFile = '';  //Plugin filename relative to the plugins directory. Many WP APIs use this to identify plugins.
@@ -216,7 +216,8 @@ class PluginUpdateChecker_1_5 {
 		//Try to parse the response
 		$pluginInfo = null;
 		if ( !is_wp_error($result) && isset($result['response']['code']) && ($result['response']['code'] == 200) && !empty($result['body']) ){
-			$pluginInfo = PluginInfo_1_3::fromJson($result['body'], $this->debugMode);
+			$pluginInfo = PluginInfo_1_6::fromJson($result['body'], $this->debugMode);
+			$pluginInfo->filename = $this->pluginFile;
 		} else if ( $this->debugMode ) {
 			$message = sprintf("The URL %s does not point to a valid plugin metadata file. ", $url);
 			if ( is_wp_error($result) ) {
@@ -247,7 +248,7 @@ class PluginUpdateChecker_1_5 {
 		if ( $pluginInfo == null ){
 			return null;
 		}
-		return PluginUpdate_1_3::fromPluginInfo($pluginInfo);
+		return PluginUpdate_1_6::fromPluginInfo($pluginInfo);
 	}
 	
 	/**
@@ -398,7 +399,7 @@ class PluginUpdateChecker_1_5 {
 		}
 
 		if ( !empty($state) && isset($state->update) && is_object($state->update) ){
-			$state->update = PluginUpdate_1_3::fromObject($state->update);
+			$state->update = PluginUpdate_1_6::fromObject($state->update);
 		}
 		return $state;
 	}
@@ -518,6 +519,7 @@ class PluginUpdateChecker_1_5 {
 			//Check if the update is actually newer than the currently installed version.
 			$installedVersion = $this->getInstalledVersion();
 			if ( ($installedVersion !== null) && version_compare($update->version, $installedVersion, '>') ){
+				$update->filename = $this->pluginFile;
 				return $update;
 			}
 		}
@@ -718,17 +720,17 @@ class PluginUpdateChecker_1_5 {
 
 endif;
 
-if ( !class_exists('PluginInfo_1_3') ):
+if ( !class_exists('PluginInfo_1_6') ):
 
 /**
  * A container class for holding and transforming various plugin metadata.
  * 
  * @author Janis Elsts
- * @copyright 2012
- * @version 1.3
+ * @copyright 2014
+ * @version 1.6
  * @access public
  */
-class PluginInfo_1_3 {
+class PluginInfo_1_6 {
 	//Most fields map directly to the contents of the plugin's info.json file.
 	//See the relevant docs for a description of their meaning.  
 	public $name;
@@ -751,6 +753,8 @@ class PluginInfo_1_3 {
 	public $last_updated;
 	
 	public $id = 0; //The native WP.org API returns numeric plugin IDs, but they're not used for anything.
+
+	public $filename; //Plugin filename relative to the plugins directory.
 		
 	/**
 	 * Create a new instance of PluginInfo from JSON-encoded plugin info 
@@ -838,24 +842,26 @@ class PluginInfo_1_3 {
 	
 endif;
 
-if ( !class_exists('PluginUpdate_1_3') ):
+if ( !class_exists('PluginUpdate_1_6') ):
 
 /**
  * A simple container class for holding information about an available update.
  * 
  * @author Janis Elsts
- * @copyright 2012
- * @version 1.2
+ * @copyright 2014
+ * @version 1.6
  * @access public
  */
-class PluginUpdate_1_3 {
+class PluginUpdate_1_6 {
 	public $id = 0;
 	public $slug;
 	public $version;
 	public $homepage;
 	public $download_url;
 	public $upgrade_notice;
-	private static $fields = array('id', 'slug', 'version', 'homepage', 'download_url', 'upgrade_notice');
+	public $filename; //Plugin filename relative to the plugins directory.
+
+	private static $fields = array('id', 'slug', 'version', 'homepage', 'download_url', 'upgrade_notice', 'filename');
 	
 	/**
 	 * Create a new instance of PluginUpdate from its JSON-encoded representation.
@@ -868,7 +874,7 @@ class PluginUpdate_1_3 {
 		//Since update-related information is simply a subset of the full plugin info,
 		//we can parse the update JSON as if it was a plugin info string, then copy over
 		//the parts that we care about.
-		$pluginInfo = PluginInfo_1_3::fromJson($json, $triggerErrors);
+		$pluginInfo = PluginInfo_1_6::fromJson($json, $triggerErrors);
 		if ( $pluginInfo != null ) {
 			return self::fromPluginInfo($pluginInfo);
 		} else {
@@ -934,12 +940,14 @@ class PluginUpdate_1_3 {
 	 */
 	public function toWpFormat(){
 		$update = new StdClass;
-		
+
 		$update->id = $this->id;
 		$update->slug = $this->slug;
 		$update->new_version = $this->version;
 		$update->url = $this->homepage;
 		$update->package = $this->download_url;
+		$update->plugin = $this->filename;
+
 		if ( !empty($this->upgrade_notice) ){
 			$update->upgrade_notice = $this->upgrade_notice;
 		}
@@ -1040,22 +1048,22 @@ class PucFactory {
 endif;
 
 //Register classes defined in this file with the factory.
-PucFactory::addVersion('PluginUpdateChecker', 'PluginUpdateChecker_1_5', '1.5');
-PucFactory::addVersion('PluginUpdate', 'PluginUpdate_1_3', '1.3');
-PucFactory::addVersion('PluginInfo', 'PluginInfo_1_3', '1.3');
+PucFactory::addVersion('PluginUpdateChecker', 'PluginUpdateChecker_1_6', '1.6');
+PucFactory::addVersion('PluginUpdate', 'PluginUpdate_1_6', '1.6');
+PucFactory::addVersion('PluginInfo', 'PluginInfo_1_6', '1.6');
 
 /**
  * Create non-versioned variants of the update checker classes. This allows for backwards
  * compatibility with versions that did not use a factory, and it simplifies doc-comments.
  */
 if ( !class_exists('PluginUpdateChecker') ) {
-	class PluginUpdateChecker extends PluginUpdateChecker_1_5 { }
+	class PluginUpdateChecker extends PluginUpdateChecker_1_6 { }
 }
 
 if ( !class_exists('PluginUpdate') ) {
-	class PluginUpdate extends PluginUpdate_1_3 {}
+	class PluginUpdate extends PluginUpdate_1_6 {}
 }
 
 if ( !class_exists('PluginInfo') ) {
-	class PluginInfo extends PluginInfo_1_3 {}
+	class PluginInfo extends PluginInfo_1_6 {}
 }