diff --git a/moviepy/audio/AudioClip.py b/moviepy/audio/AudioClip.py
index edcaf4888..5aa10e912 100644
--- a/moviepy/audio/AudioClip.py
+++ b/moviepy/audio/AudioClip.py
@@ -239,7 +239,7 @@ def write_audiofile(
 
         """
         if not fps:
-            if not self.fps:
+            if hasattr(self, "fps"):
                 fps = 44100
             else:
                 fps = self.fps