diff --git a/calendar/inc/class.calendar_so.inc.php b/calendar/inc/class.calendar_so.inc.php
index aed3dd97c9..2c39d7c823 100644
--- a/calendar/inc/class.calendar_so.inc.php
+++ b/calendar/inc/class.calendar_so.inc.php
@@ -737,7 +737,7 @@ class calendar_so
 			{
 				if (substr($col,0,7) == 'egw_cal')	// remove table name
 				{
-					$col = preg_replace('/^egw_cal[a-z_]*\.','',$col);
+					$col = preg_replace('/^egw_cal[a-z_]*\./','',$col);
 				}
 				if (isset($app_cols[$col]))
 				{