diff --git a/lib/Cake/Test/Case/Utility/ValidationTest.php b/lib/Cake/Test/Case/Utility/ValidationTest.php
index 647e46261..2af075603 100644
--- a/lib/Cake/Test/Case/Utility/ValidationTest.php
+++ b/lib/Cake/Test/Case/Utility/ValidationTest.php
@@ -2126,6 +2126,10 @@ class ValidationTest extends CakeTestCase {
 		$this->assertFalse(Validation::postal('BAA 0ABC', null, 'ca'));
 		$this->assertFalse(Validation::postal('B2A AABC', null, 'ca'));
 		$this->assertFalse(Validation::postal('B2A 2AB', null, 'ca'));
+		$this->assertFalse(Validation::postal('K1A 1D1', null, 'ca'));
+		$this->assertFalse(Validation::postal('K1O 1Q1', null, 'ca'));
+		$this->assertFalse(Validation::postal('A1A 1U1', null, 'ca'));
+		$this->assertFalse(Validation::postal('A1F 1B1', null, 'ca'));
 		$this->assertTrue(Validation::postal('X0A 0A2', null, 'ca'));
 		$this->assertTrue(Validation::postal('G4V 4C3', null, 'ca'));
 
diff --git a/lib/Cake/Utility/Validation.php b/lib/Cake/Utility/Validation.php
index 91f828ab5..accd571df 100644
--- a/lib/Cake/Utility/Validation.php
+++ b/lib/Cake/Utility/Validation.php
@@ -646,7 +646,9 @@ class Validation {
 					$regex = '/\\A\\b[A-Z]{1,2}[0-9][A-Z0-9]? [0-9][ABD-HJLNP-UW-Z]{2}\\b\\z/i';
 					break;
 				case 'ca':
-					$regex = '/\\A\\b[ABCEGHJKLMNPRSTVXY][0-9][A-Z] [0-9][A-Z][0-9]\\b\\z/i';
+					$district = '[ABCEGHJKLMNPRSTVYX]';
+					$letters = '[ABCEGHJKLMNPRSTVWXYZ]';
+					$regex = "/\\A\\b{$district}[0-9]{$letters} [0-9]{$letters}[0-9]\\b\\z/i";
 					break;
 				case 'it':
 				case 'de':