diff --git a/haystack/components/preprocessors/document_splitter.py b/haystack/components/preprocessors/document_splitter.py
index ee6a47dc95..c045c82f44 100644
--- a/haystack/components/preprocessors/document_splitter.py
+++ b/haystack/components/preprocessors/document_splitter.py
@@ -116,8 +116,9 @@ def __init__(  # pylint: disable=too-many-positional-arguments
                 keep_white_spaces=True,
             )
 
-    def _init_checks(  # pylint: disable=too-many-positional-arguments
+    def _init_checks(
         self,
+        *,
         split_by: str,
         split_length: int,
         split_overlap: int,