diff --git a/criu/cr-dump.c b/criu/cr-dump.c
index f2a99d1ed..989c97380 100644
--- a/criu/cr-dump.c
+++ b/criu/cr-dump.c
@@ -309,7 +309,7 @@ static int dump_task_fs(pid_t pid, struct parasite_dump_misc *misc, struct cr_im
 	return pb_write_one(img_from_set(imgset, CR_FD_FS), &fe, PB_FS);
 }
 
-static inline u_int64_t encode_rlim(unsigned long val)
+static inline rlim_t encode_rlim(rlim_t val)
 {
 	return val == RLIM_INFINITY ? -1 : val;
 }
diff --git a/criu/cr-restore.c b/criu/cr-restore.c
index 0eaf34d23..313516c8f 100644
--- a/criu/cr-restore.c
+++ b/criu/cr-restore.c
@@ -2352,7 +2352,7 @@ static int prep_sched_info(struct rst_sched_param *sp, ThreadCoreEntry *tc)
 	return 0;
 }
 
-static unsigned long decode_rlim(u_int64_t ival)
+static rlim_t decode_rlim(rlim_t ival)
 {
 	return ival == -1 ? RLIM_INFINITY : ival;
 }