diff --git a/libavdevice/kmsgrab.c b/libavdevice/kmsgrab.c
index 6a6de09c37..d0de774871 100644
--- a/libavdevice/kmsgrab.c
+++ b/libavdevice/kmsgrab.c
@@ -451,6 +451,7 @@ static const AVClass kmsgrab_class = {
     .item_name  = av_default_item_name,
     .option     = options,
     .version    = LIBAVUTIL_VERSION_INT,
+    .category   = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
 };
 
 AVInputFormat ff_kmsgrab_demuxer = {