diff --git a/Lib/gzip.py b/Lib/gzip.py
index 0fa4ddfdb84..6a9fbc2c1ad 100644
--- a/Lib/gzip.py
+++ b/Lib/gzip.py
@@ -363,7 +363,7 @@ class GzipFile:
         if self.mode == WRITE:
             # Ensure the compressor's buffer is flushed
             self.fileobj.write(self.compress.flush(zlib_mode))
-        self.fileobj.flush()
+            self.fileobj.flush()
 
     def fileno(self):
         """Invoke the underlying file object's fileno() method.