diff --git a/plugins/housekeeper/FolderUsageDashlet.inc.php b/plugins/housekeeper/FolderUsageDashlet.inc.php
index 1e36003..d8644e3 100755
--- a/plugins/housekeeper/FolderUsageDashlet.inc.php
+++ b/plugins/housekeeper/FolderUsageDashlet.inc.php
@@ -55,7 +55,7 @@ class FolderUsageDashlet extends KTBaseDashlet
 		$files=0;
 		$filesize=0;
 
-		if ($dh = opendir($path))
+		if (is_dir($path) && ($dh = opendir($path)))
 		{
 			while (($file = readdir($dh)) !== false)
 			{