diff --git a/src/Form/IndexProcessorsForm.php b/src/Form/IndexProcessorsForm.php
index 8a51ffc..f5b26ed 100644
--- a/src/Form/IndexProcessorsForm.php
+++ b/src/Form/IndexProcessorsForm.php
@@ -250,6 +250,12 @@ class IndexProcessorsForm extends EntityForm {
     $values = $form_state->getValues();
     $new_settings = array();
 
+    $old_processors = $this->entity->getProcessors();
+    $old_configurations = array();
+    foreach ($old_processors as $id => $processor) {
+      $old_configurations[$id] = $processor->getConfiguration();
+    }
+
     // Store processor settings.
     /** @var \Drupal\search_api\Processor\ProcessorInterface $processor */
     $processors = $this->entity->getProcessors(FALSE);
@@ -272,8 +278,7 @@ class IndexProcessorsForm extends EntityForm {
       }
     }
 
-    $old_processors = $this->entity->getProcessors();
-
+    $new_configurations = array();
     foreach ($new_settings as $plugin_id => $new_processor_settings) {
       /** @var \Drupal\search_api\Processor\ProcessorInterface $new_processor */
       $new_processor = $this->processorPluginManager->createInstance($plugin_id, $new_processor_settings['settings']);
@@ -281,11 +286,10 @@ class IndexProcessorsForm extends EntityForm {
         $this->entity->removeProcessor($plugin_id);
       }
       $this->entity->addProcessor($new_processor);
+      $new_configurations[$plugin_id] = $new_processor->getConfiguration();
     }
 
-    $new_processors = $this->entity->getProcessors();
-
-    if ($old_processors != $new_processors) {
+    if ($old_configurations != $new_configurations) {
       $form_state->set('processors_changed', TRUE);
     }
   }