diff --git a/libavformat/wavdec.c b/libavformat/wavdec.c
index 8ae7b4557b..202683bb5d 100644
--- a/libavformat/wavdec.c
+++ b/libavformat/wavdec.c
@@ -466,8 +466,8 @@ static int wav_read_packet(AVFormatContext *s, AVPacket *pkt)
     if (wav->smv_data_ofs > 0) {
         int64_t audio_dts, video_dts;
 smv_retry:
-        audio_dts = s->streams[0]->cur_dts;
-        video_dts = s->streams[1]->cur_dts;
+        audio_dts = (int32_t)s->streams[0]->cur_dts;
+        video_dts = (int32_t)s->streams[1]->cur_dts;
 
         if (audio_dts != AV_NOPTS_VALUE && video_dts != AV_NOPTS_VALUE) {
             /*We always return a video frame first to get the pixel format first*/