diff --git a/agb/interrupt_simple.s b/agb/interrupt_simple.s
index d6cb80d7..940f75b4 100644
--- a/agb/interrupt_simple.s
+++ b/agb/interrupt_simple.s
@@ -6,6 +6,11 @@
 InterruptHandlerSimple:
     ldr r2, =0x04000200 @ interrupt enable register location
 
+    mov r1, #0
+    strh r1, [r2, #8]
+
+    push {r2}
+
     ldrh r1, [r2] @ load 16 bit interrupt enable to r1
     ldrh r3, [r2, #2] @ load 16 bit interrupt request to r3
     and r0, r1, r3 @ interrupts both enabled and requested
@@ -33,5 +38,10 @@ InterruptHandlerSimple:
     bic r2, r2, #0xD
     msr cpsr_c, r2
 
+    pop {r2}
+
+    mov r1, #0
+    strh r1, [r2, #8]
+
     bx lr @ return to bios
 .pool