diff --git a/OvmfPkg/Include/IndustryStandard/Xen/xen.h b/OvmfPkg/Include/IndustryStandard/Xen/xen.h
index 79697fcb61..1cd7ab3ab1 100644
--- a/OvmfPkg/Include/IndustryStandard/Xen/xen.h
+++ b/OvmfPkg/Include/IndustryStandard/Xen/xen.h
@@ -27,6 +27,11 @@
 #ifndef __XEN_PUBLIC_XEN_H__
 #define __XEN_PUBLIC_XEN_H__
 
+//
+// Xen interface version used by Tianocore
+//
+#define __XEN_INTERFACE_VERSION__ 0x00040400
+
 #include "xen-compat.h"
 
 #if defined(MDE_CPU_IA32) || defined(MDE_CPU_X64)
diff --git a/OvmfPkg/XenBusDxe/XenBusDxe.h b/OvmfPkg/XenBusDxe/XenBusDxe.h
index 11640223eb..80253b7d1c 100644
--- a/OvmfPkg/XenBusDxe/XenBusDxe.h
+++ b/OvmfPkg/XenBusDxe/XenBusDxe.h
@@ -18,11 +18,6 @@
 
 #include <Uefi.h>
 
-//
-// Xen interface version used
-//
-#define  __XEN_INTERFACE_VERSION__ 0x00040400
-
 //
 // Libraries
 //
diff --git a/OvmfPkg/XenPvBlkDxe/XenPvBlkDxe.h b/OvmfPkg/XenPvBlkDxe/XenPvBlkDxe.h
index e5b1b5f4b9..c0b62c4f38 100644
--- a/OvmfPkg/XenPvBlkDxe/XenPvBlkDxe.h
+++ b/OvmfPkg/XenPvBlkDxe/XenPvBlkDxe.h
@@ -18,10 +18,6 @@
 
 #include <Uefi.h>
 
-//
-// Xen interface version used
-//
-#define __XEN_INTERFACE_VERSION__ 0x00040400
 #define xen_mb() MemoryFence()
 #define xen_rmb() MemoryFence()
 #define xen_wmb() MemoryFence()