diff --git a/sys/arm64/arm64/trap.c b/sys/arm64/arm64/trap.c
--- a/sys/arm64/arm64/trap.c
+++ b/sys/arm64/arm64/trap.c
@@ -375,7 +375,6 @@
 bad_far:
 			if (td->td_intr_nesting_level == 0 &&
 			    pcb->pcb_onfault != 0) {
-				frame->tf_x[0] = error;
 				frame->tf_elr = pcb->pcb_onfault;
 				return;
 			}