Fixed PHP interop tests
diff --git a/src/php/lib/Grpc/BaseStub.php b/src/php/lib/Grpc/BaseStub.php
index e1feb12..e745ec3 100755
--- a/src/php/lib/Grpc/BaseStub.php
+++ b/src/php/lib/Grpc/BaseStub.php
@@ -10,8 +10,8 @@
 
   private $channel;
 
-  public function __construct($hostname) {
-    $this->channel = new Channel($hostname, []);
+  public function __construct($hostname, $opts) {
+    $this->channel = new Channel($hostname, $opts);
   }
 
   /**