diff --git a/app/extensions/extension_edit.php b/app/extensions/extension_edit.php
index 72413c5652..daf8c16b7d 100644
--- a/app/extensions/extension_edit.php
+++ b/app/extensions/extension_edit.php
@@ -428,6 +428,7 @@
 
 								if (strlen($number_alias) > 0) {
 									$number_alias++;
+									$voicemail_id = $number_alias;
 								}
 
 								if (strlen($mwi_account) > 0) {