diff --git a/wp-app.php b/wp-app.php
index 2791ee726..e8f099769 100644
--- a/wp-app.php
+++ b/wp-app.php
@@ -485,6 +485,10 @@ EOD;
 		}
 
 		$location = get_post_meta($entry['ID'], '_wp_attached_file', true);
+		$filetype = wp_check_filetype($location);
+
+		if(!isset($location) || 'attachment' != $entry['post_type'] || empty($filetype['ext']))
+			$this->internal_error(__('Error ocurred while accessing post metadata for file location.'));
 
 		// delete file
 		@unlink($location);