diff --git a/stepmania/src/Steps.cpp b/stepmania/src/Steps.cpp
index d9a5e1c13c..67f11f21f2 100644
--- a/stepmania/src/Steps.cpp
+++ b/stepmania/src/Steps.cpp
@@ -56,7 +56,7 @@ Steps::~Steps()
 	delete notes_comp;
 }
 
-void Steps::SetNoteData( NoteData* pNewNoteData )
+void Steps::SetNoteData( const NoteData* pNewNoteData )
 {
 	ASSERT( pNewNoteData->GetNumTracks() == GameManager::NotesTypeToNumTracks(m_StepsType) );
 
diff --git a/stepmania/src/Steps.h b/stepmania/src/Steps.h
index 9c637b07d5..3ed6572e2e 100644
--- a/stepmania/src/Steps.h
+++ b/stepmania/src/Steps.h
@@ -48,7 +48,7 @@ public:
 	StepsType		m_StepsType;
 
 	void			GetNoteData( NoteData* pNoteDataOut ) const;
-	void			SetNoteData( NoteData* pNewNoteData );
+	void			SetNoteData( const NoteData* pNewNoteData );
 	void			SetSMNoteData( const CString &out );
 	CString 		GetSMNoteData() const;