diff --git a/lib/private/Preview/Imaginary.php b/lib/private/Preview/Imaginary.php
index ca46383e58b01..eb2104ce23fdb 100644
--- a/lib/private/Preview/Imaginary.php
+++ b/lib/private/Preview/Imaginary.php
@@ -57,7 +57,7 @@ public function getMimeType(): string {
 	}
 
 	public static function supportedMimeTypes(): string {
-		return '/(image\/(bmp|x-bitmap|png|jpeg|gif|heic|heif|svg\+xml|tiff|webp)|application\/(pdf|illustrator))/';
+		return '/(image\/(avif|bmp|x-bitmap|png|jpeg|gif|heic|heif|svg\+xml|tiff|webp)|application\/(pdf|illustrator))/';
 	}
 
 	public function getCroppedThumbnail(File $file, int $maxX, int $maxY, bool $crop): ?IImage {
diff --git a/resources/config/mimetypemapping.dist.json b/resources/config/mimetypemapping.dist.json
index 7b631466972fd..4ce98da05a734 100644
--- a/resources/config/mimetypemapping.dist.json
+++ b/resources/config/mimetypemapping.dist.json
@@ -16,6 +16,7 @@
 	"arw": ["image/x-dcraw"],
 	"asciidoc": ["text/asciidoc", "text/plain"],
 	"avi": ["video/x-msvideo"],
+	"avif": ["image/avif"],
 	"bash": ["text/x-shellscript"],
 	"bat": ["application/x-msdos-program"],
 	"bin": ["application/x-bin"],