1 files changed, 1 insertions, 1 deletions
diff --git a/src/php/lib/Grpc/ServerStreamingSurfaceActiveCall.php b/src/php/lib/Grpc/ServerStreamingSurfaceActiveCall.php
index 082f995d8a..f131d6bab5 100755
--- a/src/php/lib/Grpc/ServerStreamingSurfaceActiveCall.php
+++ b/src/php/lib/Grpc/ServerStreamingSurfaceActiveCall.php
@@ -31,7 +31,7 @@ class ServerStreamingSurfaceActiveCall extends AbstractSurfaceActiveCall {
    * @return An iterator of response values
    */
   public function responses() {
-    while(($response = $this->_read()) != null) {
+    while(($response = $this->_read()) !== null) {
       yield $response;
     }
   }