diff --git a/gradio/processing_utils.py b/gradio/processing_utils.py
index 1e4fba54d2..189d83191e 100644
--- a/gradio/processing_utils.py
+++ b/gradio/processing_utils.py
@@ -75,6 +75,7 @@ def decode_base64_to_binary(encoding):
 def decode_base64_to_file(encoding):
     file_obj = tempfile.NamedTemporaryFile()
     file_obj.write(decode_base64_to_binary(encoding))
+    file_obj.flush()
     return file_obj