diff --git a/core/http/src/known_media_types.rs b/core/http/src/known_media_types.rs
index d2458579..f4d4e034 100644
--- a/core/http/src/known_media_types.rs
+++ b/core/http/src/known_media_types.rs
@@ -17,6 +17,7 @@ macro_rules! known_media_types {
         BMP (is_bmp): "BMP", "image", "bmp",
         JPEG (is_jpeg): "JPEG", "image", "jpeg",
         WEBP (is_webp): "WEBP", "image", "webp",
+        AVIF (is_avif): "AVIF", "image", "avif",
         SVG (is_svg): "SVG", "image", "svg+xml",
         Icon (is_icon): "Icon", "image", "x-icon",
         WEBM (is_webm): "WEBM", "video", "webm",
@@ -59,6 +60,7 @@ macro_rules! known_extensions {
         "jpeg" => JPEG,
         "jpg" => JPEG,
         "webp" => WEBP,
+        "avif" => AVIF,
         "svg" => SVG,
         "ico" => Icon,
         "flac" => FLAC,