diff --git a/addressbook/inc/class.addressbook_export_contacts_csv.inc.php b/addressbook/inc/class.addressbook_export_contacts_csv.inc.php
index 271fcec53f..1430e95cb2 100644
--- a/addressbook/inc/class.addressbook_export_contacts_csv.inc.php
+++ b/addressbook/inc/class.addressbook_export_contacts_csv.inc.php
@@ -214,6 +214,7 @@ class addressbook_export_contacts_csv implements importexport_iface_export_plugi
 			$export_object->export_record($contact);
 			unset($contact);
 		}
+		return $export_object;
 	}
 
 	/**
diff --git a/calendar/inc/class.calendar_export_csv.inc.php b/calendar/inc/class.calendar_export_csv.inc.php
index 0fd71ef999..df61244f34 100644
--- a/calendar/inc/class.calendar_export_csv.inc.php
+++ b/calendar/inc/class.calendar_export_csv.inc.php
@@ -142,6 +142,7 @@ class calendar_export_csv implements importexport_iface_export_plugin {
 			}
 		}
 		unset($record);
+		return $export_object;
 	}
 
 	/**
diff --git a/timesheet/inc/class.timesheet_export_csv.inc.php b/timesheet/inc/class.timesheet_export_csv.inc.php
index 87baec5091..54517fe1c2 100644
--- a/timesheet/inc/class.timesheet_export_csv.inc.php
+++ b/timesheet/inc/class.timesheet_export_csv.inc.php
@@ -67,6 +67,7 @@ class timesheet_export_csv implements importexport_iface_export_plugin {
 			$export_object->export_record($record);
 			unset($record);
 		}
+		return $export_object;
 	}
 
 	/**