diff --git a/core/modules/file/src/Plugin/migrate/process/d6/FileSource.php b/core/modules/file/src/Plugin/migrate/process/d6/FileSource.php
index e23ed0d..56bb07f 100644
--- a/core/modules/file/src/Plugin/migrate/process/d6/FileSource.php
+++ b/core/modules/file/src/Plugin/migrate/process/d6/FileSource.php
@@ -20,13 +20,11 @@ class FileSource extends ProcessPluginBase {
    */
   public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
     list($source_base_path, $filepath) = $value;
-    if (($source_base_path == '') || ($source_base_path[0] = '/')) {
-      $source = $filepath;
+    // If filepath is absolute, it overrides.
+    if (!empty($filepath) && $filepath[0] === '/') {
+      return $filepath;
     }
-    else {
-      $source = $source_base_path . '/' . $filepath;
-    }
-    return $source;
+    return $source = $source_base_path . '/' . $filepath;
   }
 
 }