diff --git a/src/Models/ClientOptions.php b/src/Models/ClientOptions.php
index 41a9014..2a7ab81 100644
--- a/src/Models/ClientOptions.php
+++ b/src/Models/ClientOptions.php
@@ -95,9 +95,9 @@ class ClientOptions extends AuthOptions {
     public $httpClass = 'Ably\Http';
 
     /**
-     * @var bool defaults to false for clients with version < 1.1, otherwise true
+     * @var bool defaults to false for clients with version < 1.2, otherwise true
      */
-    public $idempotentRestPublishing = AblyRest::API_VERSION >= '1.1';
+    public $idempotentRestPublishing = AblyRest::API_VERSION >= '1.2';
 
     /**
      * @var string a class that should be used for Auth
diff --git a/tests/TypesTest.php b/tests/TypesTest.php
index de9ec6c..1f93172 100644
--- a/tests/TypesTest.php
+++ b/tests/TypesTest.php
@@ -161,7 +161,7 @@ public function testClientOptionsIdempotent()
     {
         // Test default value
         $co = new \Ably\Models\ClientOptions();
-        if (AblyRest::API_VERSION <= '1.0') {
+        if (AblyRest::API_VERSION <= '1.1') {
             $this->assertEquals( false, $co->idempotentRestPublishing );
         } else {
             $this->assertEquals( true, $co->idempotentRestPublishing );