1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/cgi.py b/Lib/cgi.py
index caa47f8012..06e03b5858 100755
--- a/Lib/cgi.py
+++ b/Lib/cgi.py
@@ -699,7 +699,7 @@ class FieldStorage:
                          self.encoding, self.errors)
             self.bytes_read += part.bytes_read
             self.list.append(part)
-            if self.bytes_read >= self.length:
+            if part.done or self.bytes_read >= self.length > 0:
                 break
         self.skip_lines()