diff --git a/haystack/preview/components/routers/__init__.py b/haystack/preview/components/routers/__init__.py
index c72c34288..32e9a422c 100644
--- a/haystack/preview/components/routers/__init__.py
+++ b/haystack/preview/components/routers/__init__.py
@@ -1,5 +1,7 @@
+from haystack.preview.components.routers.document_joiner import DocumentJoiner
 from haystack.preview.components.routers.file_type_router import FileTypeRouter
 from haystack.preview.components.routers.metadata_router import MetadataRouter
 from haystack.preview.components.routers.text_language_router import TextLanguageRouter
 
-__all__ = ["FileTypeRouter", "MetadataRouter", "TextLanguageRouter"]
+
+__all__ = ["DocumentJoiner", "FileTypeRouter", "MetadataRouter", "TextLanguageRouter"]