diff --git a/ChangeLog b/ChangeLog
index fc898fce0..5bb7bd9d9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2014-01-17  Moritz Bunkus  <moritz@bunkus.org>
+
+        * mmg: bug fix: fixed the check for WebM-compatible track types
+        for Opus.
+
 2014-01-12  Moritz Bunkus  <moritz@bunkus.org>
 
         * mkvmerge: bug fix: fixed muxing Sorenson v3 (SVQ3) video from
diff --git a/src/mmg/mmg.cpp b/src/mmg/mmg.cpp
index f23d59674..543c224f0 100644
--- a/src/mmg/mmg.cpp
+++ b/src/mmg/mmg.cpp
@@ -72,7 +72,7 @@ mmg_track_t::create_label() {
 
 bool
 mmg_track_t::is_webm_compatible() {
-  static wxRegEx re_valid_webm_codecs(wxT("VP8|Vorbis"), wxRE_ICASE);
+  static wxRegEx re_valid_webm_codecs(wxT("VP8|Vorbis|Opus"), wxRE_ICASE);
 
   return (is_audio() || is_video()) && re_valid_webm_codecs.Matches(ctype);
 }