diff --git a/libavcodec/internal.h b/libavcodec/internal.h
index dfef6eb31f..2686468545 100644
--- a/libavcodec/internal.h
+++ b/libavcodec/internal.h
@@ -153,6 +153,8 @@ int ff_alloc_packet(AVPacket *avpkt, int size);
 static av_always_inline int64_t ff_samples_to_time_base(AVCodecContext *avctx,
                                                         int64_t samples)
 {
+    if(samples == AV_NOPTS_VALUE)
+        return AV_NOPTS_VALUE;
     return av_rescale_q(samples, (AVRational){ 1, avctx->sample_rate },
                         avctx->time_base);
 }