diff --git a/wp-admin/includes/misc.php b/wp-admin/includes/misc.php
index 64cc521544..4efb1d0b30 100644
--- a/wp-admin/includes/misc.php
+++ b/wp-admin/includes/misc.php
@@ -491,7 +491,7 @@ function iis7_rewrite_rule_exists($filename) {
 	if ( $doc->load($filename) === false )
 		return false;
 	$xpath = new DOMXPath($doc);
-	$rules = $xpath->query('/configuration/system.webServer/rewrite/rules/rule[starts-with(@name,\'wordpress\')]');
+	$rules = $xpath->query('/configuration/system.webServer/rewrite/rules/rule[starts-with(@name,\'wordpress\')] | /configuration/system.webServer/rewrite/rules/rule[starts-with(@name,\'WordPress\')]');
 	if ( $rules->length == 0 )
 		return false;
 	else
@@ -521,7 +521,7 @@ function iis7_delete_rewrite_rule($filename) {
 	if ( $doc -> load($filename) === false )
 		return false;
 	$xpath = new DOMXPath($doc);
-	$rules = $xpath->query('/configuration/system.webServer/rewrite/rules/rule[starts-with(@name,\'wordpress\')]');
+	$rules = $xpath->query('/configuration/system.webServer/rewrite/rules/rule[starts-with(@name,\'wordpress\')] | /configuration/system.webServer/rewrite/rules/rule[starts-with(@name,\'WordPress\')]');
 	if ( $rules->length > 0 ) {
 		$child = $rules->item(0);
 		$parent = $child->parentNode;
@@ -562,7 +562,7 @@ function iis7_add_rewrite_rule($filename, $rewrite_rule) {
 	$xpath = new DOMXPath($doc);
 
 	// First check if the rule already exists as in that case there is no need to re-add it
-	$wordpress_rules = $xpath->query('/configuration/system.webServer/rewrite/rules/rule[starts-with(@name,\'wordpress\')]');
+	$wordpress_rules = $xpath->query('/configuration/system.webServer/rewrite/rules/rule[starts-with(@name,\'wordpress\')] | /configuration/system.webServer/rewrite/rules/rule[starts-with(@name,\'WordPress\')]');
 	if ( $wordpress_rules->length > 0 )
 		return true;
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 4ed1d5decb..c0939f02bd 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5.1-alpha-37257';
+$wp_version = '4.5.1-alpha-37274';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.