diff --git a/CHANGES b/CHANGES
index 8244d08f8..9d10876db 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,6 +1,5 @@
 0.7.0: (Future)
 Bugfixes:
- - GB Audio: Fix zombie mode bit masking
  - GB Audio: Make audio unsigned with bias (fixes mgba.io/i/749)
 Misc:
  - GBA Timer: Use global cycles for timers
@@ -177,6 +176,8 @@ Bugfixes:
  - Qt: Fix shader selector on Ubuntu (fixes mgba.io/i/767)
  - GB Serialize: Fix timer serialization
  - GB Audio: Fix incorrect channel 4 iteration
+ - GB Audio: Fix zombie mode bit masking
+ - GBA Timer: Fix count-up timing overflowing timer 3
 Misc:
  - Qt: Add language selector
  - GBA Timer: Improve accuracy of timers
diff --git a/src/gba/timer.c b/src/gba/timer.c
index 305660aa9..985ef0744 100644
--- a/src/gba/timer.c
+++ b/src/gba/timer.c
@@ -70,7 +70,7 @@ static void GBATimerUpdate(struct GBA* gba, int timerId, uint32_t cyclesLate) {
 		}
 	}
 
-	if (timerId < 4) {
+	if (timerId < 3) {
 		struct GBATimer* nextTimer = &gba->timers[timerId + 1];
 		if (GBATimerFlagsIsCountUp(nextTimer->flags)) { // TODO: Does this increment while disabled?
 			++gba->memory.io[(REG_TM1CNT_LO >> 1) + (timerId << 1)];