diff --git a/include/hw/hyperv/hyperv-proto.h b/include/hw/hyperv/hyperv-proto.h
index 4a2297307b00..fffc5ce342f2 100644
--- a/include/hw/hyperv/hyperv-proto.h
+++ b/include/hw/hyperv/hyperv-proto.h
@@ -61,6 +61,18 @@
 #define HV_MESSAGE_X64_APIC_EOI               0x80010004
 #define HV_MESSAGE_X64_LEGACY_FP_ERROR        0x80010005
 
+/*
+ * Hyper-V Synthetic debug options MSR
+ */
+#define HV_X64_MSR_SYNDBG_CONTROL               0x400000F1
+#define HV_X64_MSR_SYNDBG_STATUS                0x400000F2
+#define HV_X64_MSR_SYNDBG_SEND_BUFFER           0x400000F3
+#define HV_X64_MSR_SYNDBG_RECV_BUFFER           0x400000F4
+#define HV_X64_MSR_SYNDBG_PENDING_BUFFER        0x400000F5
+#define HV_X64_MSR_SYNDBG_OPTIONS               0x400000FF
+
+#define HV_X64_SYNDBG_OPTION_USE_HCALLS         BIT(2)
+
 /*
  * Message flags
  */
diff --git a/target/i386/kvm/hyperv-proto.h b/target/i386/kvm/hyperv-proto.h
index 464fbf09e35a..a9f056f2f3ee 100644
--- a/target/i386/kvm/hyperv-proto.h
+++ b/target/i386/kvm/hyperv-proto.h
@@ -151,18 +151,6 @@
 #define HV_X64_MSR_STIMER3_CONFIG               0x400000B6
 #define HV_X64_MSR_STIMER3_COUNT                0x400000B7
 
-/*
- * Hyper-V Synthetic debug options MSR
- */
-#define HV_X64_MSR_SYNDBG_CONTROL               0x400000F1
-#define HV_X64_MSR_SYNDBG_STATUS                0x400000F2
-#define HV_X64_MSR_SYNDBG_SEND_BUFFER           0x400000F3
-#define HV_X64_MSR_SYNDBG_RECV_BUFFER           0x400000F4
-#define HV_X64_MSR_SYNDBG_PENDING_BUFFER        0x400000F5
-#define HV_X64_MSR_SYNDBG_OPTIONS               0x400000FF
-
-#define HV_X64_SYNDBG_OPTION_USE_HCALLS         BIT(2)
-
 /*
  * Guest crash notification MSRs
  */