diff --git a/lib/php/src/transport/TSocket.php b/lib/php/src/transport/TSocket.php
index 7c47958..66028fd 100644
--- a/lib/php/src/transport/TSocket.php
+++ b/lib/php/src/transport/TSocket.php
@@ -101,7 +101,7 @@
   /**
    * Sets the send timeout.
    *
-   * @param int $timeout
+   * @param int $timeout  Timeout in milliseconds.
    */
   public function setSendTimeout($timeout) {
     $this->sendTimeout_ = $timeout;
@@ -110,7 +110,7 @@
   /**
    * Sets the receive timeout.
    *
-   * @param int $timeout
+   * @param int $timeout  Timeout in milliseconds.
    */
   public function setRecvTimeout($timeout) {
     $this->recvTimeout_ = $timeout;