diff --git a/LEGO1/mxwavepresenter.cpp b/LEGO1/mxwavepresenter.cpp
index bfd69c5f..3ab719c9 100644
--- a/LEGO1/mxwavepresenter.cpp
+++ b/LEGO1/mxwavepresenter.cpp
@@ -1,7 +1,18 @@
 #include "mxwavepresenter.h"
 
-// OFFSET: LEGO1 0x100b1ad0 STUB
+#include "decomp.h"
+
+DECOMP_STATIC_ASSERT(sizeof(MxWavePresenter) == 108);
+
+// OFFSET: LEGO1 0x100b1ad0
 void MxWavePresenter::Init()
 {
-  // TODO
+  m_unk54 = 0;
+  m_unk58 = 0;
+  m_unk5c = 0;
+  m_unk60 = 0;
+  m_unk64 = 0;
+  m_unk65 = 0;
+  m_unk66 = 0;
+  m_unk68 = 0;
 }
diff --git a/LEGO1/mxwavepresenter.h b/LEGO1/mxwavepresenter.h
index c00d978d..a8a1de45 100644
--- a/LEGO1/mxwavepresenter.h
+++ b/LEGO1/mxwavepresenter.h
@@ -3,14 +3,28 @@
 
 #include "mxsoundpresenter.h"
 
+#include "decomp.h"
+
 // VTABLE 0x100d49a8
 // SIZE 0x6c
 class MxWavePresenter : public MxSoundPresenter
 {
 private:
   void Init();
-  
+
 public:
+  MxWavePresenter() {
+    Init();
+  }
+  undefined4 m_unk54;
+  undefined4 m_unk58;
+  undefined4 m_unk5c;
+  undefined4 m_unk60;
+  undefined m_unk64;
+  undefined m_unk65;
+  undefined m_unk66;
+  undefined m_unk67;
+  undefined m_unk68;
 };
 
 #endif // MXWAVEPRESENTER_H