diff --git a/Internal/Exporter.php b/Internal/Exporter.php
index f4e5746..6ee3ee7 100644
--- a/Internal/Exporter.php
+++ b/Internal/Exporter.php
@@ -198,7 +198,7 @@ public static function export($value, string $indent = '')
             case true === $value: return 'true';
             case null === $value: return 'null';
             case '' === $value: return "''";
-            case $value instanceof \UnitEnum: return ltrim(var_export($value, true), '\\');
+            case $value instanceof \UnitEnum: return '\\'.ltrim(var_export($value, true), '\\');
         }
 
         if ($value instanceof Reference) {
diff --git a/Tests/Fixtures/unit-enum.php b/Tests/Fixtures/unit-enum.php
index 48ab51d..98bc122 100644
--- a/Tests/Fixtures/unit-enum.php
+++ b/Tests/Fixtures/unit-enum.php
@@ -1,5 +1,5 @@
 <?php
 
 return [
-    Symfony\Component\VarExporter\Tests\Fixtures\FooUnitEnum::Bar,
+    \Symfony\Component\VarExporter\Tests\Fixtures\FooUnitEnum::Bar,
 ];