diff --git a/libavfilter/avf_ahistogram.c b/libavfilter/avf_ahistogram.c
index ebd4949b3d..4f2059f26e 100644
--- a/libavfilter/avf_ahistogram.c
+++ b/libavfilter/avf_ahistogram.c
@@ -167,6 +167,7 @@ static int config_output(AVFilterLink *outlink)
     outlink->h = s->h;
     outlink->sample_aspect_ratio = (AVRational){1,1};
     outlink->frame_rate = s->frame_rate;
+    outlink->time_base = av_inv_q(outlink->frame_rate);
 
     s->histogram_h = s->h * s->phisto;
     s->ypos = s->h * s->phisto;
@@ -243,7 +244,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
         memset(s->out->data[2] + n * s->out->linesize[0], 127, w);
         memset(s->out->data[3] + n * s->out->linesize[0], 0, w);
     }
-    s->out->pts = in->pts;
+    s->out->pts = av_rescale_q(in->pts, inlink->time_base, outlink->time_base);
 
     s->first = s->frame_count;