diff --git a/core/modules/migrate/src/Plugin/migrate/process/FileCopy.php b/core/modules/migrate/src/Plugin/migrate/process/FileCopy.php
index 431e785..1ddefa4 100644
--- a/core/modules/migrate/src/Plugin/migrate/process/FileCopy.php
+++ b/core/modules/migrate/src/Plugin/migrate/process/FileCopy.php
@@ -129,7 +129,12 @@ protected function writeFile($source, $destination, $replace = FILE_EXISTS_REPLA
     if ($this->configuration['move']) {
       return file_unmanaged_move($source, $destination, $replace);
     }
-    return file_unmanaged_copy($source, $destination, $replace);
+    // We can't use file_unmanaged_copy because it will break with remote Urls.
+    $final_destination = file_destination($destination, $replace);
+    if (@copy($source, $final_destination)) {
+      return $final_destination;
+    }
+    return FALSE;
   }
 
   /**