diff --git a/Lib/sunau.py b/Lib/sunau.py
index 0a40295..a04d8c0 100644
--- a/Lib/sunau.py
+++ b/Lib/sunau.py
@@ -364,7 +364,8 @@
         else:
             return 'not compressed'
 
-    def setparams(self, (nchannels, sampwidth, framerate, nframes, comptype, compname)):
+    def setparams(self, params):
+        nchannels, sampwidth, framerate, nframes, comptype, compname = params
         self.setnchannels(nchannels)
         self.setsampwidth(sampwidth)
         self.setframerate(framerate)