diff --git a/plugins/ubiquiti/unifi_api b/plugins/ubiquiti/unifi_api
index d689a75d..003a8fc4 100755
--- a/plugins/ubiquiti/unifi_api
+++ b/plugins/ubiquiti/unifi_api
@@ -1033,7 +1033,7 @@ sub make_data {
 					'label' => $label . '-' . $thisDevice->{'name'},
 					'pckt'  => $_->{$name . '-rx_packets'} + $_->{$name . '-tx_packets'},
 					'dret'  => $_->{$name . '-rx_dropped'} + $_->{$name . '-tx_retries'} + $_->{$name . '-tx_dropped'},
-					'err'   => $_->{$name . '-rx_errors'}  + $_->{$name . '-tx_errors'},
+					'err'   => ($_->{$name . '-rx_errors'} || 0) + ($_->{$name . '-tx_errors'} || 0),
 					'type'  => $label
 				};
 			}
@@ -1209,4 +1209,4 @@ sub env_default_bool_true {
 }
 
 # Quick 2 digit zero pad
-sub zPad { return sprintf("%02d", $_[0]); }
\ No newline at end of file
+sub zPad { return sprintf("%02d", $_[0]); }