diff --git a/s3fs/core.py b/s3fs/core.py
index b8f44010..64fb1443 100644
--- a/s3fs/core.py
+++ b/s3fs/core.py
@@ -1309,7 +1309,7 @@ async def _info(self, path, bucket=None, key=None, refresh=False, version_id=Non
                 )
                 return {
                     "ETag": out.get("ETag", ""),
-                    "LastModified": out["LastModified"],
+                    "LastModified": out.get("LastModified", ""),
                     "size": out["ContentLength"],
                     "name": "/".join([bucket, key]),
                     "type": "file",