diff --git a/sys/powerpc/booke/trap_subr.S b/sys/powerpc/booke/trap_subr.S
index 2e67725dc4f4..b71f4bdb790e 100644
--- a/sys/powerpc/booke/trap_subr.S
+++ b/sys/powerpc/booke/trap_subr.S
@@ -441,6 +441,7 @@ INTERRUPT(int_instr_storage)
 INTERRUPT(int_external_input)
 	STANDARD_PROLOG(SPR_SPRG1, PC_TEMPSAVE, SPR_SRR0, SPR_SRR1)
 	FRAME_SETUP(SPR_SPRG1, PC_TEMPSAVE, EXC_EXI)
+	addi	%r3, %r1, 8
 	bl	CNAME(powerpc_extr_interrupt)
 	b	trapexit