/* Forward referenced functions */
#ifdef HAVE_LIBZ
-static char *zlib_strerror(int stat);
+static const char *zlib_strerror(int stat);
#endif
#define RETRY 10 /* retry wait time */
/*
* Convert ZLIB error code into an ASCII message
*/
-static char *zlib_strerror(int stat)
+static const char *zlib_strerror(int stat)
{
if (stat >= 0) {
return "None";