diff --git a/taglib/mpeg/id3v2/id3v2frame.cpp b/taglib/mpeg/id3v2/id3v2frame.cpp
index 1cf07ebf..c3a45a2a 100644
--- a/taglib/mpeg/id3v2/id3v2frame.cpp
+++ b/taglib/mpeg/id3v2/id3v2frame.cpp
@@ -373,6 +373,7 @@ namespace
     std::make_pair("TSO2", "ALBUMARTISTSORT"), // non-standard, used by iTunes
     std::make_pair("TSRC", "ISRC"),
     std::make_pair("TSSE", "ENCODING"),
+    std::make_pair("TSST", "DISCSUBTITLE"),
     // URL frames
     std::make_pair("WCOP", "COPYRIGHTURL"),
     std::make_pair("WOAF", "FILEWEBPAGE"),
diff --git a/tests/test_mpeg.cpp b/tests/test_mpeg.cpp
index b668d122..03eb702b 100644
--- a/tests/test_mpeg.cpp
+++ b/tests/test_mpeg.cpp
@@ -325,6 +325,7 @@ public:
     tags["COPYRIGHTURL"] = StringList("Copyright URL");
     tags["DATE"] = StringList("2021-01-03 12:29:23");
     tags["DISCNUMBER"] = StringList("3/5");
+    tags["DISCSUBTITLE"] = StringList("Disc Subtitle");
     tags["DJMIXER"] = StringList("DJ Mixer");
     tags["ENCODEDBY"] = StringList("Encoded by");
     tags["ENCODING"] = StringList("Encoding");