diff --git a/gst/matroska/matroska-mux.c b/gst/matroska/matroska-mux.c
index 9f3c8d4520..73b7a1117f 100644
--- a/gst/matroska/matroska-mux.c
+++ b/gst/matroska/matroska-mux.c
@@ -139,7 +139,8 @@ static GstStaticPadTemplate videosink_templ =
         COMMON_VIDEO_CAPS "; "
         "video/x-prores, "
         COMMON_VIDEO_CAPS "; "
-        "video/x-wmv, " "wmvversion = (int) [ 1, 3 ], " COMMON_VIDEO_CAPS)
+        "video/x-wmv, " "wmvversion = (int) [ 1, 3 ], " COMMON_VIDEO_CAPS "; "
+        "video/x-av1, " COMMON_VIDEO_CAPS)
     );
 
 #define COMMON_AUDIO_CAPS \