diff --git a/stepmania/src/StyleDef.cpp b/stepmania/src/StyleDef.cpp
index 5ce9d19192..7951fc398c 100644
--- a/stepmania/src/StyleDef.cpp
+++ b/stepmania/src/StyleDef.cpp
@@ -19,7 +19,7 @@
 #include "NoteData.h"
 
 
-void StyleDef::GetTransformedNoteDataForStyle( PlayerNumber pn, NoteData* pOriginal, NoteData* pNoteDataOut ) const
+void StyleDef::GetTransformedNoteDataForStyle( PlayerNumber pn, const NoteData* pOriginal, NoteData* pNoteDataOut ) const
 {
 	int iNewToOriginalTrack[MAX_COLS_PER_PLAYER];
 	for( int col=0; col<m_iColsPerPlayer; col++ )
diff --git a/stepmania/src/StyleDef.h b/stepmania/src/StyleDef.h
index 6b1bc14d46..8b559f8536 100644
--- a/stepmania/src/StyleDef.h
+++ b/stepmania/src/StyleDef.h
@@ -73,7 +73,7 @@ public:
 
 	PlayerNumber ControllerToPlayerNumber( GameController controller ) const;
 
-	void GetTransformedNoteDataForStyle( PlayerNumber pn, NoteData* pOriginal, NoteData* pNoteDataOut ) const;
+	void GetTransformedNoteDataForStyle( PlayerNumber pn, const NoteData* pOriginal, NoteData* pNoteDataOut ) const;
 
 	bool MatchesNotesType( StepsType type ) const;