diff --git a/core/ArrayLib.php b/core/ArrayLib.php
index 19df498cd..6195fe2b0 100755
--- a/core/ArrayLib.php
+++ b/core/ArrayLib.php
@@ -62,11 +62,7 @@ class ArrayLib {
 	 * @return array
 	 */
 	static function valuekey($arr) {
-		$newArr = array();
-		foreach($arr as $val) {
-			$newArr[$val] = $val;
-		}
-		return $newArr;
+		return array_combine($arr, $arr);
 	}
 	
 	/**
diff --git a/tests/ArrayLibTest.php b/tests/ArrayLibTest.php
index 4839e4e0e..f67765f7d 100644
--- a/tests/ArrayLibTest.php
+++ b/tests/ArrayLibTest.php
@@ -30,4 +30,20 @@ class ArrayLibTest extends SapphireTest {
 			)
 		);
 	}
+
+	function testValuekey() {
+		$this->assertEquals(
+			ArrayLib::valuekey(
+				array(
+					'testkey1' => 'testvalue1',
+					'testkey2' => 'testvalue2'
+				)
+			),
+			array(
+				'testvalue1' => 'testvalue1',
+				'testvalue2' => 'testvalue2'
+			)
+		);
+	}
+
 }
\ No newline at end of file