diff --git a/src/nostalgia/core/gba/irq.s b/src/nostalgia/core/gba/irq.s
index 48cac763..0d9cf93f 100644
--- a/src/nostalgia/core/gba/irq.s
+++ b/src/nostalgia/core/gba/irq.s
@@ -12,9 +12,6 @@
 
 .extern nostalgia_core_isr_vblank
 .extern nostalgia_core_isr_timer0
-.extern nostalgia_core_isr_timer1
-.extern nostalgia_core_isr_timer2
-.extern nostalgia_core_isr_timer3
 
 .equ REG_IFBIOS,         0x03007ff8