diff --git a/cake/libs/inflector.php b/cake/libs/inflector.php
index 550d30ced52..92fdbbe4f5d 100644
--- a/cake/libs/inflector.php
+++ b/cake/libs/inflector.php
@@ -124,7 +124,7 @@ class Inflector extends Object {
 			'/^(ox)en/i' => '\1',
 			'/(alias)(es)*$/i' => '\1',
 			'/(alumn|bacill|cact|foc|fung|nucle|radi|stimul|syllab|termin|viri?)i$/i' => '\1us',
-			'/([ftw]ax)es/' => '\1',
+			'/([ftw]ax)es/i' => '\1',
 			'/(cris|ax|test)es$/i' => '\1is',
 			'/(shoe|slave)s$/i' => '\1',
 			'/(o)es$/i' => '\1',
diff --git a/cake/tests/cases/libs/inflector.test.php b/cake/tests/cases/libs/inflector.test.php
index 13f71c07180..375f5685946 100644
--- a/cake/tests/cases/libs/inflector.test.php
+++ b/cake/tests/cases/libs/inflector.test.php
@@ -109,6 +109,7 @@ function testInflectingSingulars() {
 		$this->assertEqual(Inflector::singularize('shelves'), 'shelf');
 		$this->assertEqual(Inflector::singularize('taxis'), 'taxi');
 		$this->assertEqual(Inflector::singularize('taxes'), 'tax');
+		$this->assertEqual(Inflector::singularize('Taxes'), 'Tax');
 		$this->assertEqual(Inflector::singularize('faxes'), 'fax');
 		$this->assertEqual(Inflector::singularize('waxes'), 'wax');
         $this->assertEqual(Inflector::singularize('niches'), 'niche');
@@ -156,6 +157,7 @@ function testInflectingPlurals() {
 		$this->assertEqual(Inflector::pluralize('people'), 'people');
 		$this->assertEqual(Inflector::pluralize('glove'), 'gloves');
 		$this->assertEqual(Inflector::pluralize('crisis'), 'crises');
+		$this->assertEqual(Inflector::pluralize('tax'), 'taxes');
 		$this->assertEqual(Inflector::pluralize(''), '');
 	}