diff --git a/sys/cddl/dev/dtrace/aarch64/dtrace_subr.c b/sys/cddl/dev/dtrace/aarch64/dtrace_subr.c
--- a/sys/cddl/dev/dtrace/aarch64/dtrace_subr.c
+++ b/sys/cddl/dev/dtrace/aarch64/dtrace_subr.c
@@ -208,7 +208,7 @@
 		case EXCP_DATA_ABORT:
 			/* Flag a bad address. */
 			cpu_core[curcpu].cpuc_dtrace_flags |= CPU_DTRACE_BADADDR;
-			cpu_core[curcpu].cpuc_dtrace_illval = 0;
+			cpu_core[curcpu].cpuc_dtrace_illval = frame->tf_far;
 
 			/*
 			 * Offset the instruction pointer to the instruction