diff --git a/haystack/dataclasses/byte_stream.py b/haystack/dataclasses/byte_stream.py
index 9dca4d9697..43df1b734b 100644
--- a/haystack/dataclasses/byte_stream.py
+++ b/haystack/dataclasses/byte_stream.py
@@ -68,5 +68,5 @@ def __str__(self) -> str:
         """
         Returns a string representation of the ByteStream, truncating the data to 1KB.
         """
-        truncated = self.data[:1021] + b"..." if len(self.data) > 1024 else self.data
+        truncated = self.data[:1024] + b"..." if len(self.data) > 1024 else self.data
         return f"ByteStream(data={truncated!r}, mime_type={self.mime_type!r}, meta={self.meta!r})"
diff --git a/test/dataclasses/test_byte_stream.py b/test/dataclasses/test_byte_stream.py
index 574f1671bf..46c394a23c 100644
--- a/test/dataclasses/test_byte_stream.py
+++ b/test/dataclasses/test_byte_stream.py
@@ -71,3 +71,10 @@ def test_to_file(tmp_path, request):
     ByteStream(test_str.encode()).to_file(test_path)
     with open(test_path, "rb") as fd:
         assert fd.read().decode() == test_str
+
+
+def test_str_truncation():
+    test_str = "1234567890" * 1000
+    b = ByteStream.from_string(test_str, mime_type="text/plain", meta={"foo": "bar"})
+    string_repr = str(b)
+    assert len(string_repr) < 1200