diff --git a/mpvcore/lua/osc.lua b/mpvcore/lua/osc.lua
index ce918a539b..6d523e9250 100644
--- a/mpvcore/lua/osc.lua
+++ b/mpvcore/lua/osc.lua
@@ -958,7 +958,7 @@ function osc_init()
     metainfo.slider.border = 1
     metainfo.slider.gap = 1             -- >1 will draw triangle markers
     metainfo.slider.type = "slider"     -- "bar" for old bar-style filling
-    if (user_opts.seektooltip) then
+    if (user_opts.seektooltip) and (not (mp.property_get("length") == nil)) then
         metainfo.slider.tooltipF = tooltipF
     end