diff --git a/libavfilter/vf_scale.c b/libavfilter/vf_scale.c
index 702adc4162..07d52179e3 100644
--- a/libavfilter/vf_scale.c
+++ b/libavfilter/vf_scale.c
@@ -428,6 +428,7 @@ static int config_props_ref(AVFilterLink *outlink)
     outlink->w = inlink->w;
     outlink->h = inlink->h;
     outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
+    outlink->time_base = inlink->time_base;
 
     return 0;
 }