diff --git a/LEGO1/mxmidipresenter.cpp b/LEGO1/mxmidipresenter.cpp
index d17bf975..f16ecf3e 100644
--- a/LEGO1/mxmidipresenter.cpp
+++ b/LEGO1/mxmidipresenter.cpp
@@ -1,6 +1,8 @@
 #include "mxmidipresenter.h"
 
 #include "decomp.h"
+#include "legoomni.h"
+#include "mxmusicmanager.h"
 
 DECOMP_SIZE_ASSERT(MxMIDIPresenter, 0x58);
 
@@ -22,7 +24,15 @@ void MxMIDIPresenter::Init()
 }
 
 // OFFSET: LEGO1 0x100c2830 STUB
-void MxMIDIPresenter::Destroy(MxBool p_param)
+void MxMIDIPresenter::Destroy(MxBool p_fromDestructor)
 {
   // TODO
 }
+
+// OFFSET: LEGO1 0x100c2940
+void MxMIDIPresenter::EndMIDIAction()
+{
+  if(!MusicManager()->m_MIDIInitialized) {
+    this->EndAction();
+  }
+}
\ No newline at end of file
diff --git a/LEGO1/mxmidipresenter.h b/LEGO1/mxmidipresenter.h
index f36a6216..cf6ee88e 100644
--- a/LEGO1/mxmidipresenter.h
+++ b/LEGO1/mxmidipresenter.h
@@ -23,6 +23,8 @@ class MxMIDIPresenter : public MxMusicPresenter
     return !strcmp(name, MxMIDIPresenter::ClassName()) || MxMusicPresenter::IsA(name);
   }
 
+  virtual void EndMIDIAction(); // vtable+0x2a
+
 private:
   void Init();
   void Destroy(MxBool);
diff --git a/LEGO1/mxmusicmanager.h b/LEGO1/mxmusicmanager.h
index d60d787e..013867a7 100644
--- a/LEGO1/mxmusicmanager.h
+++ b/LEGO1/mxmusicmanager.h
@@ -24,7 +24,9 @@ class MxMusicManager : public MxAudioManager
   void SetMIDIVolume();
 
   HMIDISTRM m_MIDIStreamH;  // 0x30
+public:
   MxBool m_MIDIInitialized; // 0x34
+private:
   undefined4 m_unk38;       // 0x38
   undefined4 m_unk3c;       // 0x3c
   undefined4 m_unk40;       // 0x40