diff --git a/app/dialplans/app_defaults.php b/app/dialplans/app_defaults.php
index 6ac1e32096..8eb0c677b7 100644
--- a/app/dialplans/app_defaults.php
+++ b/app/dialplans/app_defaults.php
@@ -91,6 +91,13 @@
 			$sql = "update v_dialplans set dialplan_order = '890' where dialplan_order = '999' and dialplan_name = 'local_extension';\n";
 			$db->query($sql);
 			unset($sql);
+
+		//set empty strings to null
+			$sql = "update v_device_lines set outbound_proxy_primary = null where outbound_proxy_primary = '';\n";
+			$db->query($sql);
+			$sql = "update v_device_lines set outbound_proxy_secondary = null where outbound_proxy_secondary = '';\n";
+			$db->query($sql);
+			unset($sql);
 	}
 
 //add xml for each dialplan where the dialplan xml is empty