diff --git a/wp-includes/vars.php b/wp-includes/vars.php
index bb1a18b32..2573b27eb 100644
--- a/wp-includes/vars.php
+++ b/wp-includes/vars.php
@@ -1,7 +1,7 @@
 <?php
 
 // On which page are we ?
-if (preg_match('#([^/]+.php)#', $PHP_SELF, $self_matches)) {
+if (preg_match('#([^/]+\.php)$#', $PHP_SELF, $self_matches)) {
 	$pagenow = $self_matches[1];
 } else if (strstr($PHP_SELF, '?')) {
 	$pagenow = explode('/', $PHP_SELF);