diff --git a/addressbook/inc/class.addressbook_vcal.inc.php b/addressbook/inc/class.addressbook_vcal.inc.php
index 2f3d9b7b94..f5fb8d6383 100644
--- a/addressbook/inc/class.addressbook_vcal.inc.php
+++ b/addressbook/inc/class.addressbook_vcal.inc.php
@@ -1280,7 +1280,10 @@ class addressbook_vcal extends addressbook_bo
 					$finalRowNames['X-ASSISTANT'] = $vcardKey;
 					break;
 				default:
-					$finalRowNames[$rowName] = $vcardKey;
+					if (!isset($finalRowNames[$rowName]))
+					{
+						$finalRowNames[$rowName] = $vcardKey;
+					}
 				break;
 			}
 		}