diff --git a/src/modules/fedimbed.js b/src/modules/fedimbed.js
index 5349f79..7d20d7f 100644
--- a/src/modules/fedimbed.js
+++ b/src/modules/fedimbed.js
@@ -465,7 +465,11 @@ async function processUrl(msg, url) {
           .then((buf) => Buffer.from(buf));
 
         files.push({
-          name: attachment.type.replace("/", "."),
+          name:
+            attachment.type.indexOf("/") > -1
+              ? attachment.type.replace("/", ".")
+              : attachment.type +
+                (url.match(/\.([a-z0-9]{3,4})$/)?.[0] ?? "mp4"),
           contents: file,
         });
       }
@@ -492,11 +496,15 @@ async function processUrl(msg, url) {
           .then((buf) => Buffer.from(buf));
 
         files.push({
-          name: attachment.type
-            .replace("/", ".")
-            .replace("mpeg", "mp3")
-            .replace("vnd.wave", "wav")
-            .replace("x-wav", "wav"),
+          name:
+            attachment.type.indexOf("/") > -1
+              ? attachment.type
+                  .replace("/", ".")
+                  .replace("mpeg", "mp3")
+                  .replace("vnd.wave", "wav")
+                  .replace("x-wav", "wav")
+              : attachment.type +
+                (url.match(/\.([a-z0-9]{3,4})$/)?.[0] ?? "mp3"),
           contents: file,
         });
       }