diff --git a/zsnes/src/chips/dsp1proc.asm b/zsnes/src/chips/dsp1proc.asm
index 1ebef724..fc7bdf03 100644
--- a/zsnes/src/chips/dsp1proc.asm
+++ b/zsnes/src/chips/dsp1proc.asm
@@ -82,6 +82,7 @@ NEWSYM DSP1Read16b3F
     jae .doC000
     cmp byte[DSP1RLeft],0
     jne .movestuff
+    xor ax,ax
     ret
 .doC000
     mov ax,08000h
@@ -141,6 +142,7 @@ NEWSYM DSP1Read16b
     jae .do7000
     cmp byte[DSP1RLeft],0
     jne .movestuff
+    xor ax,ax
     ret
 .do7000
     mov ax,8000h