diff --git a/lib/php/src/transport/TSocketPool.php b/lib/php/src/transport/TSocketPool.php
index 4652e0f..dca69f9 100644
--- a/lib/php/src/transport/TSocketPool.php
+++ b/lib/php/src/transport/TSocketPool.php
@@ -232,7 +232,7 @@
           if ($this->debug_) {
             call_user_func($this->debugHandler_,
                            'TSocketPool: marking '.$host.':'.$port.
-                           ' as down for '.$this->retryInterval.' secs '.
+                           ' as down for '.$this->retryInterval_.' secs '.
                            'after '.$consecfails.' failed attempts.');
           }
           // Store the failure time