diff --git a/src/turbine/gba/irq.arm.cpp b/src/turbine/gba/irq.arm.cpp
index 0f2aa56f..6b5707c2 100644
--- a/src/turbine/gba/irq.arm.cpp
+++ b/src/turbine/gba/irq.arm.cpp
@@ -21,7 +21,7 @@ using namespace turbine;
 
 extern "C" {
 
-void turbine_isr_vblank() {
+void turbine_isr_vblank() noexcept {
 	teagba::applySpriteUpdates();
 	if constexpr(config::GbaEventLoopTimerBased) {
 		// disable vblank interrupt until it is needed again
@@ -29,7 +29,7 @@ void turbine_isr_vblank() {
 	}
 }
 
-void turbine_isr_timer0() {
+void turbine_isr_timer0() noexcept {
 	g_timerMs = g_timerMs + 1;
 }
 
diff --git a/src/turbine/gba/turbine.arm.cpp b/src/turbine/gba/turbine.arm.cpp
index e3cf2520..73530256 100644
--- a/src/turbine/gba/turbine.arm.cpp
+++ b/src/turbine/gba/turbine.arm.cpp
@@ -12,7 +12,7 @@
 namespace turbine {
 
 extern volatile gba_timer_t g_timerMs;
-gba_timer_t g_wakeupTime;
+static gba_timer_t g_wakeupTime{};
 
 ox::Error run(Context &ctx) noexcept {
 	g_wakeupTime = 0;