diff --git a/cake/libs/cache/model.php b/cake/libs/cache/model.php
index 3cfcc6b89..7a01ff869 100644
--- a/cake/libs/cache/model.php
+++ b/cake/libs/cache/model.php
@@ -149,7 +149,7 @@ class ModelEngine extends CacheEngine {
  * @access public
  */
 	function clear() {
-		return $this->__Model->deleteAll(null);
+		return $this->__Model->deleteAll('1=1');
 	}
 
 }
diff --git a/cake/tests/cases/libs/cache/model.test.php b/cake/tests/cases/libs/cache/model.test.php
index 193448180..1d6b4daf0 100644
--- a/cake/tests/cases/libs/cache/model.test.php
+++ b/cake/tests/cases/libs/cache/model.test.php
@@ -118,6 +118,27 @@ class ModelEngineTest extends CakeTestCase {
 		$this->assertTrue($result);
 	}
 
+	function testDeleteAllCache() {
+		$data = 'this is a test of the emergency broadcasting system';
+		$result = Cache::write('delete_test_1', $data);
+		$this->assertTrue($result);
+
+		$data = 'this is a test of the emergency broadcasting system';
+		$result = Cache::write('delete_test_2', $data);
+		$this->assertTrue($result);
+
+		$data = 'this is a test of the emergency broadcasting system';
+		$result = Cache::write('delete_test_3', $data);
+		$this->assertTrue($result);
+
+		$data = 'this is a test of the emergency broadcasting system';
+		$result = Cache::write('delete_test_4', $data);
+		$this->assertTrue($result);
+
+		$result = Cache::clear();
+		$this->assertTrue($result);
+	}
+
 	function tearDown() {
 		Cache::config('default');
 	}