diff --git a/field_encrypt.install b/field_encrypt.install
index 5cb2088808e4100be7bc45ee85ddd327a2a54103..a2a71b44880cc24b8c0c75916dc2c9bf2c254daa 100644
--- a/field_encrypt.install
+++ b/field_encrypt.install
@@ -28,6 +28,8 @@ function field_encrypt_uninstall(bool $is_syncing): void {
 
 /**
  * Implements hook_requirements().
+ *
+ * Remove this function when the minimum Drupal version is 11.2.
  */
 function field_encrypt_requirements(string $phase): array {
   $requirements = [];
diff --git a/src/Entity/FieldEncryptEntityType.php b/src/Entity/FieldEncryptEntityType.php
index ee015dcd00143184f9b90f7dbefbffeef589bb59..b7a7e90646da7143281f488ef7ce1a2c573ea3f2 100644
--- a/src/Entity/FieldEncryptEntityType.php
+++ b/src/Entity/FieldEncryptEntityType.php
@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace Drupal\field_encrypt\Entity;
 
+use Drupal\Component\Utility\DeprecationHelper;
 use Drupal\Core\Config\Entity\ConfigEntityBase;
 use Drupal\Core\Entity\Attribute\ConfigEntityType;
 use Drupal\Core\Entity\EntityStorageInterface;
@@ -117,7 +118,15 @@ class FieldEncryptEntityType extends ConfigEntityBase {
    */
   public function postSave(EntityStorageInterface $storage, $update = TRUE): void {
     parent::postSave($storage, $update);
-    if (!$update || $this->getBaseFields() !== $this->original->getBaseFields()) {
+
+    $original_entity = DeprecationHelper::backwardsCompatibleCall(
+      \Drupal::VERSION,
+      '11.2',
+      fn () => $this->getOriginal(),
+      fn () => $this->original,
+    );
+
+    if (!$update || $this->getBaseFields() !== $original_entity->getBaseFields()) {
       self::queueEntityUpdates($this->id());
     }
     // Update the field_encrypt module's state.
diff --git a/src/ProcessEntities.php b/src/ProcessEntities.php
index 9ddd530a2b0c1d647d2d3ff6c33cccf008632d22..2512d026db34e83c3344f68d0d21f66e26ec0336 100644
--- a/src/ProcessEntities.php
+++ b/src/ProcessEntities.php
@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace Drupal\field_encrypt;
 
+use Drupal\Component\Utility\DeprecationHelper;
 use Drupal\Core\Entity\ContentEntityInterface;
 use Drupal\Core\Extension\ModuleHandlerInterface;
 use Drupal\Core\Field\FieldItemListInterface;
@@ -77,16 +78,22 @@ class ProcessEntities {
       }
 
       // The entity storage handler has clever logic to ensure that configurable
-      // fields are only saved if necessary. If entity->original is set we need
+      // fields are only saved if necessary. If entity->getOriginal() we need
       // to ensure the field values are the values in the database and not the
       // unencrypted values so that they are saved if necessary. This is
       // particularly important when a previously encrypted field is set to be
       // unencrypted.
       // @see \Drupal\Core\Entity\Sql\SqlContentEntityStorage::saveToDedicatedTables()
       // @see \Drupal\Core\Entity\ContentEntityStorageBase::hasFieldValueChanged()
-      if (isset($translated_entity->original) && $translated_entity->original instanceof ContentEntityInterface) {
-        if ($translated_entity->original->hasTranslation($language->getId())) {
-          $translated_original = $translated_entity->original->getTranslation($language->getId());
+      $translated_original = DeprecationHelper::backwardsCompatibleCall(
+        \Drupal::VERSION,
+        '11.2',
+        fn () => $translated_entity->getOriginal(),
+        fn () => $translated_entity->original ?? NULL
+      );
+      if ($translated_original instanceof ContentEntityInterface) {
+        if ($translated_original->hasTranslation($language->getId())) {
+          $translated_original = $translated_original->getTranslation($language->getId());
           $this->setEncryptedFieldValues($translated_original, 'getUnencryptedPlaceholderValue');
         }
       }
@@ -118,9 +125,15 @@ class ProcessEntities {
       $translated_entity = $entity->getTranslation($language->getId());
       $this->setEncryptedFieldValues($translated_entity);
       // Reverse the logic to encrypt the original entity in ::encryptEntity().
-      if (isset($translated_entity->original) && $translated_entity->original instanceof ContentEntityInterface) {
-        if ($translated_entity->original->hasTranslation($language->getId())) {
-          $this->decryptEntity($translated_entity->original);
+      $translated_original = DeprecationHelper::backwardsCompatibleCall(
+          \Drupal::VERSION,
+          '11.2',
+          fn () => $translated_entity->getOriginal(),
+          fn () => $translated_entity->original ?? NULL
+        );
+      if ($translated_original instanceof ContentEntityInterface) {
+        if ($translated_original->hasTranslation($language->getId())) {
+          $this->decryptEntity($translated_original);
         }
       }
     }
diff --git a/tests/modules/field_encrypt_test/src/Hook/FieldEncryptTestHooks.php b/tests/modules/field_encrypt_test/src/Hook/FieldEncryptTestHooks.php
index ea2288af4443910522cc0f4c244682c740d252e8..c63f404927d0f27a50a10ee075af007068ca65d2 100644
--- a/tests/modules/field_encrypt_test/src/Hook/FieldEncryptTestHooks.php
+++ b/tests/modules/field_encrypt_test/src/Hook/FieldEncryptTestHooks.php
@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace Drupal\field_encrypt_test\Hook;
 
+use Drupal\Component\Utility\DeprecationHelper;
 use Drupal\Core\Entity\ContentEntityInterface;
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\EntityTypeInterface;
@@ -41,9 +42,17 @@ class FieldEncryptTestHooks {
       $this->messenger->addMessage(
         $this->t('Field encrypt test hook_entity_update: @label', ['@label' => $entity->label()])
       );
-      if (isset($entity->original)) {
+      $original_entity = DeprecationHelper::backwardsCompatibleCall(
+        \Drupal::VERSION,
+        '11.2',
+        fn () => $entity->getOriginal(),
+        fn () => $entity->original ?? NULL
+      );
+      if (isset($original_entity)) {
         $this->messenger->addMessage(
-          $this->t('Field encrypt test hook_entity_update: Original label -> @label', ['@label' => $entity->original->label()])
+          $this->t('Field encrypt test hook_entity_update: Original label -> @label', [
+            '@label' => $original_entity->label(),
+          ])
         );
       }
     }
@@ -55,11 +64,21 @@ class FieldEncryptTestHooks {
   #[Hook('node_update')]
   public function nodeUpdate(EntityInterface $entity): void {
     $this->messenger->addMessage(
-      $this->t('Field encrypt test hook_ENTITY_TYPE_update: @label', ['@label' => $entity->label()])
+      $this->t('Field encrypt test hook_ENTITY_TYPE_update: @label', [
+        '@label' => $entity->label(),
+      ])
+    );
+    $original_entity = DeprecationHelper::backwardsCompatibleCall(
+      \Drupal::VERSION,
+      '11.2',
+      fn () => $entity->getOriginal(),
+      fn () => $entity->original ?? NULL
     );
-    if (isset($entity->original)) {
+    if (isset($original_entity)) {
       $this->messenger->addMessage(
-        $this->t('Field encrypt test hook_ENTITY_TYPE_update: Original label -> @label', ['@label' => $entity->original->label()])
+        $this->t('Field encrypt test hook_ENTITY_TYPE_update: Original label -> @label', [
+          '@label' => $original_entity->label(),
+        ])
       );
     }
   }