diff --git a/target/hppa/int_helper.c b/target/hppa/int_helper.c
index 467ee7daf5..98e9d688f6 100644
--- a/target/hppa/int_helper.c
+++ b/target/hppa/int_helper.c
@@ -126,7 +126,7 @@ void hppa_cpu_do_interrupt(CPUState *cs)
         env->cr[CR_IIASQ] =
             hppa_form_gva_psw(old_psw, env->iasq_f, env->iaoq_f) >> 32;
         env->cr_back[0] =
-            hppa_form_gva_psw(old_psw, env->iasq_f, env->iaoq_f) >> 32;
+            hppa_form_gva_psw(old_psw, env->iasq_b, env->iaoq_b) >> 32;
     } else {
         env->cr[CR_IIASQ] = 0;
         env->cr_back[0] = 0;