diff --git a/spacy/training/corpus.py b/spacy/training/corpus.py
index aab2eae94..cf643feec 100644
--- a/spacy/training/corpus.py
+++ b/spacy/training/corpus.py
@@ -221,7 +221,7 @@ class JsonlCorpus:
 
     def __init__(
         self,
-        path: Union[str, Path],
+        path: Optional[Union[str, Path]],
         *,
         limit: int = 0,
         min_length: int = 0,