diff --git a/modules/node/node.module b/modules/node/node.module
index 967c0a5c848..909d26773d9 100644
--- a/modules/node/node.module
+++ b/modules/node/node.module
@@ -273,7 +273,7 @@ function node_teaser($body, $format = NULL, $size = NULL) {
   // parse errors.
   if (isset($format)) {
     $filters = filter_list_format($format);
-    if (isset($filters['filter/1']) && strpos($body, '<?') !== FALSE) {
+    if (isset($filters['php/0']) && strpos($body, '<?') !== FALSE) {
       return $body;
     }
   }