diff --git a/core/manifest/ClassManifest.php b/core/manifest/ClassManifest.php
index a1e38d7bd..5bbe0c3bb 100644
--- a/core/manifest/ClassManifest.php
+++ b/core/manifest/ClassManifest.php
@@ -354,7 +354,7 @@ class SS_ClassManifest {
 			$extends    = isset($class['extends']) ? implode('', $class['extends']) : null;
 			$implements = isset($class['interfaces']) ? $class['interfaces'] : null;
 			
-			if($extends && $extends[0] != '/\\') {
+			if($extends && $extends[0] != '\\') {
 				$extends = $namespace . $extends;
 			} elseif($extends) {
 				$extends = substr($extends, 1);
diff --git a/tests/core/manifest/NamespacedClassManifestTest.php b/tests/core/manifest/NamespacedClassManifestTest.php
index c529ca996..f4dd418c4 100644
--- a/tests/core/manifest/NamespacedClassManifestTest.php
+++ b/tests/core/manifest/NamespacedClassManifestTest.php
@@ -44,7 +44,8 @@ class NamespacedClassManifestTest extends SapphireTest {
 			'sapphire\test\classd' => "{$this->base}/module/classes/ClassD.php",
 			'sapphire\test\classe' => "{$this->base}/module/classes/ClassE.php",
 			'sapphire\test\classf' => "{$this->base}/module/classes/ClassF.php",
-			'sapphire\test\classg' => "{$this->base}/module/classes/ClassG.php"
+			'sapphire\test\classg' => "{$this->base}/module/classes/ClassG.php",
+			'sapphire\test\classh' => "{$this->base}/module/classes/ClassH.php"
 		);
 		
 		$this->assertEquals($expect, $this->manifest->getClasses());
@@ -52,13 +53,13 @@ class NamespacedClassManifestTest extends SapphireTest {
 
 	public function testGetClassNames() {
 		$this->assertEquals(
-			array('sapphire\test\classa', 'sapphire\test\classb', 'sapphire\test\classc', 'sapphire\test\classd', 'sapphire\test\classe', 'sapphire\test\classf', 'sapphire\test\classg'),
+			array('sapphire\test\classa', 'sapphire\test\classb', 'sapphire\test\classc', 'sapphire\test\classd', 'sapphire\test\classe', 'sapphire\test\classf', 'sapphire\test\classg', 'sapphire\test\classh'),
 			$this->manifest->getClassNames());
 	}
 
 	public function testGetDescendants() {
 		$expect = array(
-			'sapphire\test\classa' => array('sapphire\test\ClassB')
+			'sapphire\test\classa' => array('sapphire\test\ClassB', 'sapphire\test\ClassH'),
 		);
 		
 		$this->assertEquals($expect, $this->manifest->getDescendants());
@@ -66,8 +67,8 @@ class NamespacedClassManifestTest extends SapphireTest {
 
 	public function testGetDescendantsOf() {
 		$expect = array(
-			'SAPPHIRE\TEST\CLASSA' => array('sapphire\test\ClassB'),
-			'sapphire\test\classa' => array('sapphire\test\ClassB'),
+			'SAPPHIRE\TEST\CLASSA' => array('sapphire\test\ClassB', 'sapphire\test\ClassH'),
+			'sapphire\test\classa' => array('sapphire\test\ClassB', 'sapphire\test\ClassH'),
 		);
 
 		foreach ($expect as $class => $desc) {
diff --git a/tests/core/manifest/fixtures/namespaced_classmanifest/module/classes/ClassH.php b/tests/core/manifest/fixtures/namespaced_classmanifest/module/classes/ClassH.php
new file mode 100644
index 000000000..17597aafb
--- /dev/null
+++ b/tests/core/manifest/fixtures/namespaced_classmanifest/module/classes/ClassH.php
@@ -0,0 +1,8 @@
+<?php
+/**
+ * @ignore
+ */
+
+namespace sapphire\test;
+
+class ClassH extends \sapphire\test\ClassA {  }