diff --git a/sketches/audio-prototype0.tal b/sketches/audio-prototype0.tal
index 9ed91f1..b31c0e3 100644
--- a/sketches/audio-prototype0.tal
+++ b/sketches/audio-prototype0.tal
@@ -218,7 +218,7 @@ BRK
 		 STA
 RTN
 
-@draw-bytes ( x2 y2 ptr-addrZ ptr-offset bytesaddrA  -- )
+@draw-bytes ( x2 y2 ptr-offset  -- )
   ;registers ,&addr STR2  ( starting address of bytes )
   ,&offset STR ( starting offset of these bytes )
 	.ptr-register-nibbles ,&ptr-addr STR ( address of pointer to bytes )