diff --git a/examples/cx16/pcmaudio/stream-wav.p8 b/examples/cx16/pcmaudio/stream-wav.p8
index 6de700d4b..ca07d8293 100644
--- a/examples/cx16/pcmaudio/stream-wav.p8
+++ b/examples/cx16/pcmaudio/stream-wav.p8
@@ -189,8 +189,7 @@ interrupt {
             ldx  #4
 -           ldy  #0
 -           lda  (cx16.r0),y
-            sec
-            sbc  #128       ; convert to signed
+            eor  #$80       ; convert to signed 8-bit
             sta  cx16.VERA_AUDIO_DATA
             iny
             bne  -