diff --git a/code/GoogleSitemapDecorator.php b/code/GoogleSitemapDecorator.php
index 8734e22..2c2fd31 100644
--- a/code/GoogleSitemapDecorator.php
+++ b/code/GoogleSitemapDecorator.php
@@ -61,11 +61,11 @@ class GoogleSitemapDecorator extends SiteTreeDecorator {
 	}
 	
 	function onAfterPublish() {
-		GoogleSiteMap::ping();
+		GoogleSitemap::ping();
 	}
 	
 	function onAfterUnpublish() {
-		GoogleSiteMap::ping();
+		GoogleSitemap::ping();
 	}
 	
 	/**