diff --git a/README.md b/README.md
index 698f228..6c27235 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,13 @@ Some key features:
 * Change MIDI volume level (using MIDI CC7)
 * Scale song speed between half and double tempo
 * Lyrics, Piano Player and MIDI Channels views
-* Supports MID/KAR (Standard MIDI Files) and WRK (Cakewalk) file formats
+* Supports MID/KAR/RMI (Standard MIDI Files) and WRK (Cakewalk) file formats
+
+New in v1.5.1:
+
+* GH ticket #6: The dependency target "update_helpfiles" of target "dmidiplayer" does not exist
+* Error checking for DwmGetWindowAttribute() call. This caused a problem in Windows 7 running the "Windows Classic" theme
+* Support for RIFF MIDI files, provided by Drumstick 2.4.0
 
 New in v1.5.0:
 
diff --git a/sequence.cpp b/sequence.cpp
index b573fe8..68e5e90 100644
--- a/sequence.cpp
+++ b/sequence.cpp
@@ -47,7 +47,8 @@ Sequence::Sequence(QObject *parent) : QObject(parent),
     m_duration(0),
     m_lastBeat(0),
     m_beatLength(0),
-    m_tick(0)
+    m_tick(0),
+    m_codec(nullptr)
 {
     m_rmid = new Rmidi(this);
     connect(m_rmid, &Rmidi::signalRiffData, this, &Sequence::dataHandler);
@@ -286,6 +287,7 @@ void Sequence::clear()
     m_lowestMidiNote = 127;
     m_highestMidiNote = 0;
     m_curTrack = 0;
+    m_codec = nullptr;
     m_infoMap.clear();
     for(int i=0; i<MIDI_STD_CHANNELS; ++i) {
         m_channelUsed[i] = false;