diff --git a/qemu/target/arm/cpu64.c b/qemu/target/arm/cpu64.c
index 76a0ff3a..b1ee5cb7 100644
--- a/qemu/target/arm/cpu64.c
+++ b/qemu/target/arm/cpu64.c
@@ -378,6 +378,9 @@ ARMCPU *cpu_aarch64_init(struct uc_struct *uc)
         }
     }
 
+    // Backward compatability to enable FULL 64bits address space.
+    env->pstate = PSTATE_MODE_EL1h;
+
     arm_rebuild_hflags(env);
 
     return cpu;