}
 
 void fast_export_begin_note(uint32_t revision, const char *author,
-               const char *log, unsigned long timestamp, const char *note_ref)
+               const char *log, timestamp_t timestamp, const char *note_ref)
 {
        static int firstnote = 1;
        size_t loglen = strlen(log);
        printf("commit %s\n", note_ref);
-       printf("committer %s <%s@%s> %lu +0000\n", author, author, "local", timestamp);
+       printf("committer %s <%s@%s> %"PRItime" +0000\n", author, author, "local", timestamp);
        printf("data %"PRIuMAX"\n", (uintmax_t)loglen);
        fwrite(log, loglen, 1, stdout);
        if (firstnote) {
 void fast_export_begin_commit(uint32_t revision, const char *author,
                        const struct strbuf *log,
                        const char *uuid, const char *url,
-                       unsigned long timestamp, const char *local_ref)
+                       timestamp_t timestamp, const char *local_ref)
 {
        static const struct strbuf empty = STRBUF_INIT;
        if (!log)
        }
        printf("commit %s\n", local_ref);
        printf("mark :%"PRIu32"\n", revision);
-       printf("committer %s <%s@%s> %lu +0000\n",
+       printf("committer %s <%s@%s> %"PRItime" +0000\n",
                   *author ? author : "nobody",
                   *author ? author : "nobody",
                   *uuid ? uuid : "local", timestamp);