diff --git a/Libraries/LibCore/MimeData.cpp b/Libraries/LibCore/MimeData.cpp
index fd8b09e818c..056e0884544 100644
--- a/Libraries/LibCore/MimeData.cpp
+++ b/Libraries/LibCore/MimeData.cpp
@@ -114,6 +114,7 @@ static Array const s_registered_mime_type = {
     MimeType { .name = "font/woff"sv, .common_extensions = { "woff"sv }, .description = "WOFF font"sv, .magic_bytes = Vector<u8> { 'W', 'O', 'F', 'F' } },
     MimeType { .name = "font/woff2"sv, .common_extensions = { "woff2"sv }, .description = "WOFF2 font"sv, .magic_bytes = Vector<u8> { 'W', 'O', 'F', '2' } },
 
+    MimeType { .name = "image/avif"sv, .common_extensions = { ".avif"sv }, .description = "AVIF image data"sv },
     MimeType { .name = "image/bmp"sv, .common_extensions = { ".bmp"sv }, .description = "BMP image data"sv, .magic_bytes = Vector<u8> { 'B', 'M' } },
     MimeType { .name = "image/gif"sv, .common_extensions = { ".gif"sv }, .description = "GIF image data"sv, .magic_bytes = Vector<u8> { 'G', 'I', 'F', '8', '7', 'a' } },
     MimeType { .name = "image/gif"sv, .common_extensions = { ".gif"sv }, .description = "GIF image data"sv, .magic_bytes = Vector<u8> { 'G', 'I', 'F', '8', '9', 'a' } },