diff --git a/fileformats.yml b/fileformats.yml
index c12d1e1..4a0b060 100644
--- a/fileformats.yml
+++ b/fileformats.yml
@@ -2467,6 +2467,9 @@ x-fmt/345:
 x-fmt/346:
   name: Microstation CAD Drawing
   action: ignore
+  reidentify:
+    reason: Pronom identifies the format on extension alone
+    on_fail: "action"
   ignore:
     template: not-convertable
     reason: At the moment the file can't be convertet with the current tools for CAD-files.