diff --git a/classes/Database/PDO/Common.php b/classes/Database/PDO/Common.php
index 0c2305d..51e9d88 100644
--- a/classes/Database/PDO/Common.php
+++ b/classes/Database/PDO/Common.php
@@ -227,7 +227,7 @@ class Database_PDO_Common extends Database_Common
 				$end_time = microtime(true);
 				$duration = $end_time - $start_time;
 
-				if ($duration >= 1)
+				if ($duration >= 1 && isset($loggable_query))
 				{
 					Log::slowQuery($duration . ' seconds: ' . $loggable_query);
 				}