diff --git a/app/src/main/java/eu/faircode/email/EntityAttachment.java b/app/src/main/java/eu/faircode/email/EntityAttachment.java
index a4bfc797d6..001bac7f45 100644
--- a/app/src/main/java/eu/faircode/email/EntityAttachment.java
+++ b/app/src/main/java/eu/faircode/email/EntityAttachment.java
@@ -179,6 +179,9 @@ public class EntityAttachment {
         if ("docx".equals(extension))
             return "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
 
+        if ("mp3".equals(extension))
+            return "audio/mpeg";
+
         if ("xls".equals(extension))
             return "application/vnd.ms-excel";