diff --git a/dibi/Nette/DibiNettePanel.php b/dibi/Nette/DibiNettePanel.php
index 1bc12975..2f4ec3b2 100644
--- a/dibi/Nette/DibiNettePanel.php
+++ b/dibi/Nette/DibiNettePanel.php
@@ -42,7 +42,7 @@ class DibiNettePanel extends DibiObject implements IBarPanel
 	public function __construct($explain = TRUE, $filter = NULL)
 	{
 		$this->filter = $filter ? (int) $filter : DibiEvent::QUERY;
-		$this->explain = (bool) $explain;
+		$this->explain = $explain;
 	}
 
 
@@ -123,7 +123,8 @@ class DibiNettePanel extends DibiObject implements IBarPanel
 				try {
 					$backup = array($event->connection->onEvent, dibi::$numOfQueries, dibi::$totalTime);
 					$event->connection->onEvent = NULL;
-					$explain = dibi::dump($event->connection->nativeQuery('EXPLAIN ' . $event->sql), TRUE);
+					$cmd = is_string($this->explain) ? $this->explain : 'EXPLAIN';
+					$explain = dibi::dump($event->connection->nativeQuery("$cmd $event->sql"), TRUE);
 				} catch (DibiException $e) {}
 				list($event->connection->onEvent, dibi::$numOfQueries, dibi::$totalTime) = $backup;
 			}