{
auth_cram_md5_options_block *ob =
(auth_cram_md5_options_block *)(ablock->options_block);
-uschar *challenge = string_sprintf("<%d.%d@%s>", getpid(), time(NULL),
- primary_hostname);
+uschar *challenge = string_sprintf("<%d.%ld@%s>", getpid(),
+ (long int) time(NULL), primary_hostname);
uschar *clear, *secret;
uschar digest[16];
int i, rc, len;