diff --git a/qemu/target/arm/cpu64.c b/qemu/target/arm/cpu64.c
index db715ecb..1ea0b347 100644
--- a/qemu/target/arm/cpu64.c
+++ b/qemu/target/arm/cpu64.c
@@ -269,6 +269,10 @@ static void aarch64_max_initfn(struct uc_struct *uc, Object *obj, void *opaque)
     t = FIELD_DP64(t, ID_AA64PFR0, ADVSIMD, 1);
     cpu->isar.id_aa64pfr0 = t;
 
+    t = cpu->isar.id_aa64pfr1;
+    t = FIELD_DP64(t, ID_AA64PFR1, BT, 1);
+    cpu->isar.id_aa64pfr1 = t;
+
     t = cpu->isar.id_aa64mmfr1;
     t = FIELD_DP64(t, ID_AA64MMFR1, HPDS, 1); /* HPD */
     t = FIELD_DP64(t, ID_AA64MMFR1, LO, 1);