diff --git a/zsnes/src/chips/dsp1proc.asm b/zsnes/src/chips/dsp1proc.asm
index 6eb88d05..62fc0186 100644
--- a/zsnes/src/chips/dsp1proc.asm
+++ b/zsnes/src/chips/dsp1proc.asm
@@ -84,7 +84,7 @@ NEWSYM DSP1Read16b3F
     jae .doC000
     cmp byte[DSP1RLeft],0
     jne .movestuff
-    mov ax,0FFFFh
+    xor ax,ax
     ret
 .doC000
     mov ax,08000h
@@ -144,7 +144,7 @@ NEWSYM DSP1Read16b
     jae .do7000
     cmp byte[DSP1RLeft],0
     jne .movestuff
-    mov ax,0FFFFh
+    xor ax,ax
     ret
 .do7000
     mov ax,8000h