diff --git a/osdep/timer.h b/osdep/timer.h
index 3a925caec3..3eab817626 100644
--- a/osdep/timer.h
+++ b/osdep/timer.h
@@ -23,7 +23,7 @@
 // Initialize timer, must be called at least once at start.
 void mp_time_init(void);
 
-// Return time in nanoseconds. Never wraps. Never returns 0 or negative values.
+// Return time in nanoseconds. Never wraps. Never returns negative values.
 int64_t mp_time_ns(void);
 
 // Return time in seconds. Can have down to 1 nanosecond resolution, but will
diff --git a/test/timer.c b/test/timer.c
index f85009c1e7..962760f592 100644
--- a/test/timer.c
+++ b/test/timer.c
@@ -13,7 +13,7 @@ int main(void)
     /* timekeeping */
     {
         int64_t now = mp_time_ns();
-        assert_true(now > 0);
+        assert_true(now >= 0);
 
         mp_sleep_ns(MP_TIME_MS_TO_NS(10));