diff --git a/builtin-commit.c b/builtin-commit.c
index c870037b07ca00aeeeb369fdae98c9b828be0af2..b75d5e931d1427f431fa493553c3eac203caccd6 100644
--- a/builtin-commit.c
+++ b/builtin-commit.c
@@ -320,7 +320,7 @@ static char *prepare_index(int argc, const char **argv, const char *prefix)
 		die("unable to write new_index file");
 
 	fd = hold_lock_file_for_update(&false_lock,
-				       git_path("next-index-%d", getpid()), 1);
+				       git_path("next-index-%"PRIuMAX, (uintmax_t) getpid()), 1);
 
 	create_base_index();
 	add_remove_files(&partial);
diff --git a/builtin-fetch-pack.c b/builtin-fetch-pack.c
index 273239af3be61736ee4ff484d628950c4de7311a..17a5a422c27e898fb68e3d55a9a5d7e714a40ff6 100644
--- a/builtin-fetch-pack.c
+++ b/builtin-fetch-pack.c
@@ -540,7 +540,7 @@ static int get_pack(int xd[2], char **pack_lockfile)
 			*av++ = "--fix-thin";
 		if (args.lock_pack || unpack_limit) {
 			int s = sprintf(keep_arg,
-					"--keep=fetch-pack %d on ", getpid());
+					"--keep=fetch-pack %"PRIuMAX " on ", (uintmax_t) getpid());
 			if (gethostname(keep_arg + s, sizeof(keep_arg) - s))
 				strcpy(keep_arg + s, "localhost");
 			*av++ = keep_arg;
diff --git a/daemon.c b/daemon.c
index 23278e28dc16cc30bd9516f2f2675cd93d5ac182..c315932ced825f96f669003616a9fb304309c75d 100644
--- a/daemon.c
+++ b/daemon.c
@@ -86,7 +86,7 @@ static void logreport(int priority, const char *err, va_list params)
 		 * Since stderr is set to linebuffered mode, the
 		 * logging of different processes will not overlap
 		 */
-		fprintf(stderr, "[%d] ", (int)getpid());
+		fprintf(stderr, "[%"PRIuMAX"] ", (uintmax_t)getpid());
 		vfprintf(stderr, err, params);
 		fputc('\n', stderr);
 	}
@@ -658,7 +658,7 @@ static void check_dead_children(void)
 		remove_child(pid);
 		if (!WIFEXITED(status) || (WEXITSTATUS(status) > 0))
 			dead = " (with error)";
-		loginfo("[%d] Disconnected%s", (int)pid, dead);
+		loginfo("[%"PRIuMAX"] Disconnected%s", (uintmax_t)pid, dead);
 	}
 }
 
@@ -923,7 +923,7 @@ static void store_pid(const char *path)
 	FILE *f = fopen(path, "w");
 	if (!f)
 		die("cannot open pid file %s: %s", path, strerror(errno));
-	if (fprintf(f, "%d\n", getpid()) < 0 || fclose(f) != 0)
+	if (fprintf(f, "%"PRIuMAX"\n", (uintmax_t) getpid()) < 0 || fclose(f) != 0)
 		die("failed to write pid file %s: %s", path, strerror(errno));
 }
 
diff --git a/fast-import.c b/fast-import.c
index 7089e6f9e6c5fa9142f468e54afe7d33a6d2eec7..acb8e2e360910574ef3b85546a82425bf1696d11 100644
--- a/fast-import.c
+++ b/fast-import.c
@@ -376,7 +376,7 @@ static void dump_marks_helper(FILE *, uintmax_t, struct mark_set *);
 
 static void write_crash_report(const char *err)
 {
-	char *loc = git_path("fast_import_crash_%d", getpid());
+	char *loc = git_path("fast_import_crash_%"PRIuMAX, (uintmax_t) getpid());
 	FILE *rpt = fopen(loc, "w");
 	struct branch *b;
 	unsigned long lu;
@@ -390,8 +390,8 @@ static void write_crash_report(const char *err)
 	fprintf(stderr, "fast-import: dumping crash report to %s\n", loc);
 
 	fprintf(rpt, "fast-import crash report:\n");
-	fprintf(rpt, "    fast-import process: %d\n", getpid());
-	fprintf(rpt, "    parent process     : %d\n", getppid());
+	fprintf(rpt, "    fast-import process: %"PRIuMAX"\n", (uintmax_t) getpid());
+	fprintf(rpt, "    parent process     : %"PRIuMAX"\n", (uintmax_t) getppid());
 	fprintf(rpt, "    at %s\n", show_date(time(NULL), 0, DATE_LOCAL));
 	fputc('\n', rpt);
 
diff --git a/receive-pack.c b/receive-pack.c
index d44c19e6b577023dcbaa188a0e67130ff4e5bd9a..b81678a9705c3f4bb7a6ff47e2af87db70e0ef66 100644
--- a/receive-pack.c
+++ b/receive-pack.c
@@ -407,7 +407,7 @@ static const char *unpack(void)
 		char keep_arg[256];
 		struct child_process ip;
 
-		s = sprintf(keep_arg, "--keep=receive-pack %i on ", getpid());
+		s = sprintf(keep_arg, "--keep=receive-pack %"PRIuMAX" on ", (uintmax_t) getpid());
 		if (gethostname(keep_arg + s, sizeof(keep_arg) - s))
 			strcpy(keep_arg + s, "localhost");