diff --git a/google/cloud/storage/blob.py b/google/cloud/storage/blob.py
index f47c09181..205d4aeb2 100644
--- a/google/cloud/storage/blob.py
+++ b/google/cloud/storage/blob.py
@@ -2456,7 +2456,7 @@ def upload_from_file(
         to that project.
 
         :type file_obj: file
-        :param file_obj: A file handle open for reading.
+        :param file_obj: A file handle opened in binary mode for reading.
 
         :type rewind: bool
         :param rewind:
diff --git a/samples/snippets/storage_upload_from_stream.py b/samples/snippets/storage_upload_from_stream.py
index e2d31a5e3..08eb25889 100644
--- a/samples/snippets/storage_upload_from_stream.py
+++ b/samples/snippets/storage_upload_from_stream.py
@@ -25,8 +25,8 @@ def upload_blob_from_stream(bucket_name, file_obj, destination_blob_name):
 
     # The stream or file (file-like object) from which to read
     # import io
-    # file_obj = io.StringIO()
-    # file_obj.write("This is test data.")
+    # file_obj = io.BytesIO()
+    # file_obj.write(b"This is test data.")
 
     # The desired name of the uploaded GCS object (blob)
     # destination_blob_name = "storage-object-name"