diff --git a/core/lib/Drupal/Core/Entity/Field/Type/EntityWrapper.php b/core/lib/Drupal/Core/Entity/Field/Type/EntityWrapper.php
index eb6ae7d888b..f6f224e0aff 100644
--- a/core/lib/Drupal/Core/Entity/Field/Type/EntityWrapper.php
+++ b/core/lib/Drupal/Core/Entity/Field/Type/EntityWrapper.php
@@ -90,7 +90,7 @@ class EntityWrapper extends TypedData implements IteratorAggregate, ComplexDataI
     if ($value instanceof EntityInterface && $value->isNew()) {
       $this->newEntity = $value;
       $this->entityType = $value->entityType();
-      $value = FALSE;
+      $value = 0;
     }
     elseif ($value instanceof EntityInterface) {
       $this->entityType = $value->entityType();
diff --git a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/TaxonomyFormatterBase.php b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/TaxonomyFormatterBase.php
index f5071375618..a17bdbaacea 100644
--- a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/TaxonomyFormatterBase.php
+++ b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/TaxonomyFormatterBase.php
@@ -30,7 +30,7 @@ abstract class TaxonomyFormatterBase extends FormatterBase {
     foreach ($entities as $id => $entity) {
       foreach ($items[$id] as $delta => $item) {
         // Force the array key to prevent duplicates.
-        if ($item['tid'] !== FALSE) {
+        if ($item['tid'] !== 0) {
           $tids[$item['tid']] = $item['tid'];
         }
       }
@@ -51,7 +51,7 @@ abstract class TaxonomyFormatterBase extends FormatterBase {
             $items[$id][$delta]['entity'] = $terms[$item['tid']];
           }
           // Terms to be created are not in $terms, but are still legitimate.
-          elseif ($item['tid'] === FALSE && isset($item['entity'])) {
+          elseif ($item['tid'] === 0 && isset($item['entity'])) {
             // Leave the item in place.
           }
           // Otherwise, unset the instance value, since the term does not exist.
diff --git a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/widget/TaxonomyAutocompleteWidget.php b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/widget/TaxonomyAutocompleteWidget.php
index 7ceb3509536..01a01faf7d9 100644
--- a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/widget/TaxonomyAutocompleteWidget.php
+++ b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/widget/TaxonomyAutocompleteWidget.php
@@ -97,7 +97,7 @@ class TaxonomyAutocompleteWidget extends WidgetBase {
           'vid' => $vocabulary->id(),
           'name' => $value,
         ));
-        $item = array('tid' => FALSE, 'entity' => $term);
+        $item = array('tid' => 0, 'entity' => $term);
       }
       $items[] = $item;
     }