diff --git a/core/modules/views/src/Plugin/views/filter/FilterPluginBase.php b/core/modules/views/src/Plugin/views/filter/FilterPluginBase.php
index 1d24826b75..4424078b64 100644
--- a/core/modules/views/src/Plugin/views/filter/FilterPluginBase.php
+++ b/core/modules/views/src/Plugin/views/filter/FilterPluginBase.php
@@ -1495,7 +1495,7 @@ public function acceptExposedInput($input) {
         $value = $input[$this->options['group_info']['identifier']];
       }
       else {
-        $value = $input[$this->options['expose']['identifier']];
+        $value = $input[$this->options['expose']['identifier']] ?? NULL;
       }
 
       // Various ways to check for the absence of non-required input.