1 files changed, 4 insertions, 0 deletions

diff --git a/src/api/mastodon/index.ts b/src/api/mastodon/index.ts
index f3bf45c..3bfe9c8 100644
--- a/src/api/mastodon/index.ts
+++ b/src/api/mastodon/index.ts
@@ -22,6 +22,10 @@ export const client = got.extend({
 export async function upload(buf: Buffer, filename: string) {
     const type = await fileType.fromBuffer(buf);
 
+    if (!type) {
+        throw new Error("Couldn't determine file type");
+    }
+
     const body = new FormData();
     body.append("file", buf, { filename: `${filename}.${type.ext}`, contentType: type.mime });