diff --git a/target/arm/helper.c b/target/arm/helper.c
index 23cf44fcf4..d220612a20 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -9704,6 +9704,9 @@ static void arm_cpu_do_interrupt_aarch64(CPUState *cs)
             break;
         }
     }
+    if (cpu_isar_feature(aa64_mte, cpu)) {
+        new_mode |= PSTATE_TCO;
+    }
 
     pstate_write(env, PSTATE_DAIF | new_mode);
     env->aarch64 = 1;