From a064306916924efccc4bf3fce64f8e0870366503 Mon Sep 17 00:00:00 2001
From: Vicki Pfau <vi@endrift.com>
Date: Wed, 22 Mar 2023 01:47:30 -0700
Subject: [PATCH] GB MBC: Fix crash with NT Old 2 if rumble callback isn't
 installed

---
 src/gb/mbc/unlicensed.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gb/mbc/unlicensed.c b/src/gb/mbc/unlicensed.c
index 58725fa98..1577a15fa 100644
--- a/src/gb/mbc/unlicensed.c
+++ b/src/gb/mbc/unlicensed.c
@@ -227,7 +227,7 @@ void _GBNTOld2(struct GB* gb, uint16_t address, uint8_t value) {
 			mbcState->rumble = !!(value & 0x80);
 		}
 
-		if (mbcState->rumble) {
+		if (mbcState->rumble && memory->rumble) {
 			memory->rumble->setRumble(memory->rumble, !!(mbcState->swapped ? value & 0x08 : value & 0x02));
 		}
 		break;