diff --git a/qemu/target/arm/cpu.h b/qemu/target/arm/cpu.h
index d86a6253..7093fd5f 100644
--- a/qemu/target/arm/cpu.h
+++ b/qemu/target/arm/cpu.h
@@ -854,7 +854,7 @@ struct ARMCPU {
         uint64_t id_aa64dfr0;
         uint64_t id_aa64dfr1;
     } isar;
-    uint32_t midr;
+    uint64_t midr;
     uint32_t revidr;
     uint32_t reset_fpsid;
     uint32_t ctr;