diff --git a/defs.h b/defs.h
index 3ed15ced..437755c0 100644
--- a/defs.h
+++ b/defs.h
@@ -955,6 +955,8 @@ extern void ts_add(struct timespec *, const struct timespec *, const struct time
 extern void ts_sub(struct timespec *, const struct timespec *, const struct timespec *);
 extern void ts_mul(struct timespec *, const struct timespec *, int);
 extern void ts_div(struct timespec *, const struct timespec *, int);
+extern void ts_min(struct timespec *, const struct timespec *, const struct timespec *);
+extern void ts_max(struct timespec *, const struct timespec *, const struct timespec *);
 
 #ifdef ENABLE_STACKTRACE
 extern void unwind_init(void);
diff --git a/util.c b/util.c
index 5250ae78..59e7583c 100644
--- a/util.c
+++ b/util.c
@@ -109,6 +109,30 @@ ts_mul(struct timespec *tv, const struct timespec *a, int n)
 	tv->tv_nsec = nsec % 1000000000;
 }
 
+void
+ts_min(struct timespec *tv, const struct timespec *a, const struct timespec *b)
+{
+	if (ts_cmp(a, b) < 0) {
+		tv->tv_sec = a->tv_sec;
+		tv->tv_nsec = a->tv_nsec;
+	} else {
+		tv->tv_sec = b->tv_sec;
+		tv->tv_nsec = b->tv_nsec;
+	}
+}
+
+void
+ts_max(struct timespec *tv, const struct timespec *a, const struct timespec *b)
+{
+	if (ts_cmp(a, b) > 0) {
+		tv->tv_sec = a->tv_sec;
+		tv->tv_nsec = a->tv_nsec;
+	} else {
+		tv->tv_sec = b->tv_sec;
+		tv->tv_nsec = b->tv_nsec;
+	}
+}
+
 #if !defined HAVE_STPCPY
 char *
 stpcpy(char *dst, const char *src)