diff --git a/src/asfvideo.cpp b/src/asfvideo.cpp
index b976ee4e..f6cee7b8 100644
--- a/src/asfvideo.cpp
+++ b/src/asfvideo.cpp
@@ -454,7 +454,7 @@ void AsfVideo::fileProperties() {
   xmpData()["Xmp.video.FileLength"] = readQWORDTag(io_);
   xmpData()["Xmp.video.CreationDate"] = readQWORDTag(io_);
   xmpData()["Xmp.video.DataPackets"] = readQWORDTag(io_);
-  xmpData()["Xmp.video.Duration"] = readQWORDTag(io_);
+  xmpData()["Xmp.video.duration"] = readQWORDTag(io_);
   xmpData()["Xmp.video.SendDuration"] = readQWORDTag(io_);
   xmpData()["Xmp.video.Preroll"] = readQWORDTag(io_);
 
diff --git a/test/data/test_reference_files/sample_960x540.asf.out b/test/data/test_reference_files/sample_960x540.asf.out
index cef43055..3bc4cb60 100644
Binary files a/test/data/test_reference_files/sample_960x540.asf.out and b/test/data/test_reference_files/sample_960x540.asf.out differ