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-rw-r--r--home/serial.asm2
1 files changed, 1 insertions, 1 deletions
diff --git a/home/serial.asm b/home/serial.asm
index ab97d6b2e..d5df52a23 100644
--- a/home/serial.asm
+++ b/home/serial.asm
@@ -15,7 +15,7 @@ Serial:: ; 6ef
jr nz, .asm_721
ld a, [$ffcb]
- inc a
+ inc a ; is it equal to -1?
jr z, .asm_726
ld a, [rSB]