diff --git a/phpgwapi/inc/class.egw_session_memcache.inc.php b/phpgwapi/inc/class.egw_session_memcache.inc.php
index 5e43692fac..a7ed0296a2 100644
--- a/phpgwapi/inc/class.egw_session_memcache.inc.php
+++ b/phpgwapi/inc/class.egw_session_memcache.inc.php
@@ -247,9 +247,10 @@ class egw_session_memcache
 	{
 		if (!self::_acquire_and_wait($id)) return false;
 
-		error_log("\n memcache destroy  $id:$n:");
-		for($n=0; self::$memcache->delete($id.($n?'-'.$n:'')); ++$n) ;
-
+		for($n=0; self::$memcache->delete($id.($n?'-'.$n:'')); ++$n)
+		{
+			if (self::DEBUG > 0) error_log("******* memcache destroy  $id:$n:");
+		}
 		self::_release($id);
 
 		return $n > 0;