diff -r b31441753abc Modules/audioop.c
--- a/Modules/audioop.c	Tue Mar 18 07:47:35 2014 +0100
+++ b/Modules/audioop.c	Tue Mar 18 20:53:16 2014 +0200
@@ -301,12 +301,12 @@
 #define GETINT24(cp, i)  (                              \
         ((unsigned char *)(cp) + (i))[2] +              \
         (((unsigned char *)(cp) + (i))[1] << 8) +       \
-        (((signed char *)(cp) + (i))[0] << 16) )
+        (int)((unsigned int)(int)((signed char *)(cp) + (i))[0] << 16) )
 #else
 #define GETINT24(cp, i)  (                              \
         ((unsigned char *)(cp) + (i))[0] +              \
         (((unsigned char *)(cp) + (i))[1] << 8) +       \
-        (((signed char *)(cp) + (i))[2] << 16) )
+        (int)((unsigned int)(int)((signed char *)(cp) + (i))[2] << 16) )
 #endif