diff --git a/src/CalendarHelper.php b/src/CalendarHelper.php
index 315b4df..14a61f2 100644
--- a/src/CalendarHelper.php
+++ b/src/CalendarHelper.php
@@ -872,7 +872,7 @@ class CalendarHelper extends DateHelper {
           // Set to the default value, reset below if another value is found.
           $argument = static::getDateArgumentHandler($view, $id);
 
-          if ($argument->getGranularity() == $granularity) {
+          if (!empty($argument) && $argument->getGranularity() == $granularity) {
 
             $displays[$view->id()][$granularity] = $display['id'];
           }