diff --git a/stepmania/src/RageDisplay.cpp b/stepmania/src/RageDisplay.cpp
index ad08fc45ab..6c56f59c39 100644
--- a/stepmania/src/RageDisplay.cpp
+++ b/stepmania/src/RageDisplay.cpp
@@ -355,7 +355,7 @@ public:
 	}
 
 	// Obtain the current matrix at the top of the stack
-	const RageMatrix* GetTop() { return &stack.back(); }
+	const RageMatrix* GetTop() const { return &stack.back(); }
 	void SetTop( const RageMatrix &m ) { stack.back() = m; }
 };
 
diff --git a/stepmania/src/RageDisplay.h b/stepmania/src/RageDisplay.h
index 669e77e9a2..b08c0e23e6 100644
--- a/stepmania/src/RageDisplay.h
+++ b/stepmania/src/RageDisplay.h
@@ -329,11 +329,11 @@ protected:
 	void UpdateCentering();
 
 	// Called by the RageDisplay derivitives
-	const RageMatrix* GetCentering();
-	const RageMatrix* GetProjectionTop();
-	const RageMatrix* GetViewTop();
-	const RageMatrix* GetWorldTop();
-	const RageMatrix* GetTextureTop();
+	const RageMatrix* GetCentering() const;
+	const RageMatrix* GetProjectionTop() const;
+	const RageMatrix* GetViewTop() const;
+	const RageMatrix* GetWorldTop() const;
+	const RageMatrix* GetTextureTop() const;
 
 	//
 	// To limit the framerate, call FrameLimitBeforeVsync before waiting