diff --git a/extern/audaspace/plugins/ffmpeg/FFMPEGReader.cpp b/extern/audaspace/plugins/ffmpeg/FFMPEGReader.cpp
index c0e16d6a887..b55c73e5ae8 100644
--- a/extern/audaspace/plugins/ffmpeg/FFMPEGReader.cpp
+++ b/extern/audaspace/plugins/ffmpeg/FFMPEGReader.cpp
@@ -409,7 +409,7 @@ void FFMPEGReader::seek(int position)
 	{
 		double pts_time_base = av_q2d(m_formatCtx->streams[m_stream]->time_base);
 
-		uint64_t st_time = m_formatCtx->streams[m_stream]->start_time;
+		int64_t st_time = m_formatCtx->streams[m_stream]->start_time;
 		uint64_t seek_pos = (uint64_t)(position / (pts_time_base * m_specs.rate));
 
 		if(st_time != AV_NOPTS_VALUE)