diff --git a/classes/PostFixtures.inc b/classes/PostFixtures.inc
index ed4cdfa..7a46e37 100644
--- a/classes/PostFixtures.inc
+++ b/classes/PostFixtures.inc
@@ -209,7 +209,10 @@ class PostFixtures {
 		$value = $matches[0];
 		$parts = explode(':', $matches[1]);
 		if (count($parts) > 1) {
-			$source = array_shift($parts);
+			$source = strtolower(array_shift($parts));
+			switch ($source) {
+				case 'cat': $source = 'category'; break;
+			}
 			if (count($parts) == 1) {
 				$index = reset($parts);
 				if (isset($this->{"_${source}"})) {
diff --git a/test/PostFixturesTest.php b/test/PostFixturesTest.php
index c07c061..884d827 100644
--- a/test/PostFixturesTest.php
+++ b/test/PostFixturesTest.php
@@ -255,6 +255,10 @@ class PostFixturesTest extends PHPUnit_Framework_TestCase {
 				array('test' => '${category:category}'),
 				array('test' => '1')
 			),
+			array(
+				array('test' => '${cat:category}'),
+				array('test' => '1')
+			),
 		);
 	}