diff --git a/_config/mimetypes.yml b/_config/mimetypes.yml
index dfd3d7f4c6e..48328042797 100644
--- a/_config/mimetypes.yml
+++ b/_config/mimetypes.yml
@@ -67,6 +67,7 @@ SilverStripe\Control\HTTP:
     box: application/vnd.previewsystems.box
     boz: application/x-bzip2
     bpk: application/octet-stream
+    brf: text/plain
     btif: image/prs.btif
     bz: application/x-bzip
     bz2: application/x-bzip2