diff --git a/system/config/media.yaml b/system/config/media.yaml
index 1f1469f9d..b118a210e 100644
--- a/system/config/media.yaml
+++ b/system/config/media.yaml
@@ -28,6 +28,10 @@ types:
     type: image
     thumb: media/thumb-webp.png
     mime: image/webp
+  avif:
+    type: image
+    thumb: media/thumb.png
+    mime: image/avif
   gif:
     type: animated
     thumb: media/thumb-gif.png