diff --git a/SignalServiceKit/Util/MimeTypeUtil.swift b/SignalServiceKit/Util/MimeTypeUtil.swift
index bd17a9a2de..3d95d3a034 100644
--- a/SignalServiceKit/Util/MimeTypeUtil.swift
+++ b/SignalServiceKit/Util/MimeTypeUtil.swift
@@ -963,7 +963,7 @@ public enum MimeTypeUtil {
         "audio/midi": "midi",
         "audio/mod": "mod",
         "audio/mp4": "m4a",
-        "audio/mpeg": "mpg",
+        "audio/mpeg": "mp3",
         "audio/mpeg3": "mp3",
         "audio/ogg": "oga",
         "audio/s3m": "s3m",