diff --git a/qemu/target/arm/cpu.c b/qemu/target/arm/cpu.c
index 40cd376e..96139e92 100644
--- a/qemu/target/arm/cpu.c
+++ b/qemu/target/arm/cpu.c
@@ -1710,6 +1710,7 @@ static void arm_max_initfn(struct uc_struct *uc, Object *obj, void *opaque)
         t = cpu->isar.id_isar6;
         t = FIELD_DP32(t, ID_ISAR6, JSCVT, 1);
         t = FIELD_DP32(t, ID_ISAR6, DP, 1);
+        t = FIELD_DP32(t, ID_ISAR6, FHM, 1);
         cpu->isar.id_isar6 = t;
 
         t = cpu->id_mmfr4;
diff --git a/qemu/target/arm/cpu64.c b/qemu/target/arm/cpu64.c
index 91fde9c4..1953e399 100644
--- a/qemu/target/arm/cpu64.c
+++ b/qemu/target/arm/cpu64.c
@@ -253,6 +253,7 @@ static void aarch64_max_initfn(struct uc_struct *uc, Object *obj, void *opaque)
     t = FIELD_DP64(t, ID_AA64ISAR0, SM3, 1);
     t = FIELD_DP64(t, ID_AA64ISAR0, SM4, 1);
     t = FIELD_DP64(t, ID_AA64ISAR0, DP, 1);
+    t = FIELD_DP64(t, ID_AA64ISAR0, FHM, 1);
     cpu->isar.id_aa64isar0 = t;
 
     t = cpu->isar.id_aa64isar1;
@@ -292,6 +293,7 @@ static void aarch64_max_initfn(struct uc_struct *uc, Object *obj, void *opaque)
     u = cpu->isar.id_isar6;
     u = FIELD_DP32(u, ID_ISAR6, JSCVT, 1);
     u = FIELD_DP32(u, ID_ISAR6, DP, 1);
+    u = FIELD_DP32(u, ID_ISAR6, FHM, 1);
     cpu->isar.id_isar6 = u;
 
     // Unicorn: we lie and enable them anyway