diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index 486f90b..546c0e8 100644
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -847,6 +847,7 @@
         { HV_SYS_REG_ID_AA64DFR1_EL1, &host_isar.id_aa64dfr1 },
         { HV_SYS_REG_ID_AA64ISAR0_EL1, &host_isar.id_aa64isar0 },
         { HV_SYS_REG_ID_AA64ISAR1_EL1, &host_isar.id_aa64isar1 },
+        /* Add ID_AA64ISAR2_EL1 here when HVF supports it */
         { HV_SYS_REG_ID_AA64MMFR0_EL1, &host_isar.id_aa64mmfr0 },
         { HV_SYS_REG_ID_AA64MMFR1_EL1, &host_isar.id_aa64mmfr1 },
         { HV_SYS_REG_ID_AA64MMFR2_EL1, &host_isar.id_aa64mmfr2 },