diff --git a/video/out/vo.c b/video/out/vo.c
index 9a98ebafb6..99efc9eec9 100644
--- a/video/out/vo.c
+++ b/video/out/vo.c
@@ -262,7 +262,7 @@ void vo_draw_osd(struct vo *vo, struct osd_state *osd)
         vo->driver->draw_osd(vo, osd);
 }
 
-void vo_flip_page(struct vo *vo, unsigned int pts_us, int duration)
+void vo_flip_page(struct vo *vo, int64_t pts_us, int duration)
 {
     if (!vo->config_ok)
         return;
diff --git a/video/out/vo.h b/video/out/vo.h
index 2d3e507213..351dd3f0ae 100644
--- a/video/out/vo.h
+++ b/video/out/vo.h
@@ -292,7 +292,7 @@ int vo_get_buffered_frame(struct vo *vo, bool eof);
 void vo_skip_frame(struct vo *vo);
 void vo_new_frame_imminent(struct vo *vo);
 void vo_draw_osd(struct vo *vo, struct osd_state *osd);
-void vo_flip_page(struct vo *vo, unsigned int pts_us, int duration);
+void vo_flip_page(struct vo *vo, int64_t pts_us, int duration);
 void vo_check_events(struct vo *vo);
 void vo_seek_reset(struct vo *vo);
 void vo_destroy(struct vo *vo);