diff --git a/core/modules/migrate/src/Plugin/migrate/source/SourcePluginBase.php b/core/modules/migrate/src/Plugin/migrate/source/SourcePluginBase.php
index 6eebdea..3d18794 100644
--- a/core/modules/migrate/src/Plugin/migrate/source/SourcePluginBase.php
+++ b/core/modules/migrate/src/Plugin/migrate/source/SourcePluginBase.php
@@ -523,15 +523,15 @@ protected function getHighWaterField() {
    * {@inheritdoc}
    */
   public function preRollback(MigrateRollbackEvent $event) {
-    // Nothing to do in this implementation.
+    // Reset the high-water mark.
+    $this->saveHighWater(NULL);
   }
 
   /**
    * {@inheritdoc}
    */
   public function postRollback(MigrateRollbackEvent $event) {
-    // Reset the high-water mark.
-    $this->saveHighWater(NULL);
+    // Nothing to do in this implementation.
   }
 
 }