#include "cache.h"
+#include "config.h"
 #include "refs.h"
 #include "pkt-line.h"
 #include "sideband.h"
 #define CLIENT_SHALLOW (1u << 18)
 #define HIDDEN_REF     (1u << 19)
 
-static unsigned long oldest_have;
+static timestamp_t oldest_have;
 
 static int deepen_relative;
 static int multi_ack;
        struct string_list deepen_not = STRING_LIST_INIT_DUP;
        int depth = 0;
        int has_non_tip = 0;
-       unsigned long deepen_since = 0;
+       timestamp_t deepen_since = 0;
        int deepen_rev_list = 0;
 
        shallow_nr = 0;
                }
                if (skip_prefix(line, "deepen-since ", &arg)) {
                        char *end = NULL;
-                       deepen_since = strtoul(arg, &end, 0);
+                       deepen_since = parse_timestamp(arg, &end, 0);
                        if (!end || *end || !deepen_since ||
                            /* revisions.c's max_age -1 is special */
                            deepen_since == -1)
 
                argv_array_push(&av, "rev-list");
                if (deepen_since)
-                       argv_array_pushf(&av, "--max-age=%lu", deepen_since);
+                       argv_array_pushf(&av, "--max-age=%"PRItime, deepen_since);
                if (deepen_not.nr) {
                        argv_array_push(&av, "--not");
                        for (i = 0; i < deepen_not.nr; i++) {