diff --git a/emhttp/plugins/dynamix/include/Helpers.php b/emhttp/plugins/dynamix/include/Helpers.php
index 7e7eb978e..c59148e2b 100644
--- a/emhttp/plugins/dynamix/include/Helpers.php
+++ b/emhttp/plugins/dynamix/include/Helpers.php
@@ -49,7 +49,7 @@ function my_time($time, $fmt=NULL) {
 }
 function my_temp($value) {
   global $display;
-  $unit = _var($display,'unit');
+  $unit = _var($display,'unit','C');
   $number = _var($display,'number','.,');
   return is_numeric($value) ? (($unit=='F' ? fahrenheit($value) : str_replace('.', $number[0], $value)).' °'.$unit) : $value;
 }