diff --git a/src/device/gba/gba.go b/src/device/gba/gba.go
index bc580ba8f..6eba80780 100644
--- a/src/device/gba/gba.go
+++ b/src/device/gba/gba.go
@@ -85,6 +85,9 @@ var (
 	SIO = (*SIO_Type)(unsafe.Add(unsafe.Pointer(REG_BASE), uintptr(0x0134)))
 
 	INTERRUPT = (*INTERRUPT_Type)(unsafe.Add(unsafe.Pointer(REG_BASE), uintptr(0x0200)))
+
+	// BIOS interrupt flags
+	BIOS_IF = (*volatile.Register16)(unsafe.Pointer(uintptr(0x03007FF8)))
 )
 
 // Main memory sections
diff --git a/src/runtime/interrupt/interrupt_gameboyadvance.go b/src/runtime/interrupt/interrupt_gameboyadvance.go
index 2224066ed..8eacc9669 100644
--- a/src/runtime/interrupt/interrupt_gameboyadvance.go
+++ b/src/runtime/interrupt/interrupt_gameboyadvance.go
@@ -23,6 +23,7 @@ func handleInterrupt() {
 	for i := 0; i < 14; i++ {
 		if flags&(1<<uint(i)) != 0 {
 			gba.INTERRUPT.IF.Set(1 << uint(i)) // acknowledge interrupt
+			gba.BIOS_IF.Set(1 << uint(i))      // acknowledge interrupt for BIOS
 			callInterruptHandler(i)
 		}
 	}