diff --git a/gtts/tts.py b/gtts/tts.py
index be62d0f..2cacf34 100644
--- a/gtts/tts.py
+++ b/gtts/tts.py
@@ -333,6 +333,7 @@ def save(self, savefile):
         """
         with open(str(savefile), "wb") as f:
             self.write_to_fp(f)
+            f.flush()
             log.debug("Saved to %s", savefile)