diff --git a/zsnes/src/chips/sa1proc.asm b/zsnes/src/chips/sa1proc.asm
index c84f9a82..0edd6423 100644
--- a/zsnes/src/chips/sa1proc.asm
+++ b/zsnes/src/chips/sa1proc.asm
@@ -120,7 +120,7 @@ NEWSYM SA1Swap
     ; Check if IRQ is executed on SA-1
     xor eax,eax
     mov al,dl
-   ; add dh,25
+   add dh,25
     mov edi,[SA1tablead+eax*4]
     mov byte[SA1Status],1
     test dword[SA1DoIRQ],0FF000003h