diff -r 0ae768637a07 Modules/audioop.c
--- a/Modules/audioop.c	Sat Jan 25 22:19:47 2014 -0800
+++ b/Modules/audioop.c	Sun Jan 26 09:33:15 2014 +0200
@@ -1359,6 +1359,7 @@
     }
 
     /* str <- Space for the output buffer. */
+    assert(len >= 0);
     if (len == 0)
         str = PyBytes_FromStringAndSize(NULL, 0);
     else {
@@ -1370,7 +1371,7 @@
            case ceiling(len/inrate) * outrate. */
 
         /* compute ceiling(len/inrate) without overflow */
-        Py_ssize_t q = len > 0 ? 1 + (len - 1) / inrate : 0;
+        Py_ssize_t q = 1 + (len - 1) / inrate;
         if (outrate > PY_SSIZE_T_MAX / q / bytes_per_frame)
             str = NULL;
         else