diff --git a/BIN/SHELL.S.CMD.txt b/BIN/SHELL.S.CMD.txt
index d2938bba..fd54e315 100644
--- a/BIN/SHELL.S.CMD.txt
+++ b/BIN/SHELL.S.CMD.txt
@@ -234,6 +234,7 @@ Cmd.SetPrefixA	pha
 				
 				ldy #S.PS.hPREFIX
 				sta (pPs),y
+				lda #0
 *				clc
 				rts
 *--------------------------------------