diff --git a/Lib/aifc.py b/Lib/aifc.py
index a5f86be..f663dd6 100644
--- a/Lib/aifc.py
+++ b/Lib/aifc.py
@@ -665,7 +665,8 @@
 ##          raise Error, 'cannot change parameters after starting to write'
 ##      self._version = version
 
-    def setparams(self, (nchannels, sampwidth, framerate, nframes, comptype, compname)):
+    def setparams(self, info):
+        nchannels, sampwidth, framerate, nframes, comptype, compname = info
         if self._nframeswritten:
             raise Error, 'cannot change parameters after starting to write'
         if comptype not in ('NONE', 'ULAW', 'ALAW', 'G722'):