diff --git a/src/state.rs b/src/state.rs
index 1911eec..3db4ac5 100644
--- a/src/state.rs
+++ b/src/state.rs
@@ -86,11 +86,6 @@ impl State {
 		&self.registers [frame.register_offset..]
 	}
 	
-	fn register_window_mut (&mut self) -> &mut [Value] {
-		let frame = self.stack.last ().unwrap ();
-		&mut self.registers [frame.register_offset..]
-	}
-	
 	/// Short form to get access to a register within our window
 	
 	fn reg (&self, i: u8) -> &Value {