diff --git a/OvmfPkg/Library/HardwareInfoLib/HardwareInfoTypesLib.h b/OvmfPkg/Library/HardwareInfoLib/HardwareInfoTypesLib.h
index bee60bd172..40a785eac4 100644
--- a/OvmfPkg/Library/HardwareInfoLib/HardwareInfoTypesLib.h
+++ b/OvmfPkg/Library/HardwareInfoLib/HardwareInfoTypesLib.h
@@ -20,9 +20,8 @@
 typedef enum {
   HardwareInfoTypeUndefined      = 0,
   HardwareInfoTypeHostBridge     = 1,
+  HardwareInfoTypeQemuUefiVars   = 2,
   HardwareInfoTypeSvsmVirtioMmio = 0x1000,
-
-  HardwareInfoTypeMax
 } HARDWARE_INFO_TYPE;
 
 //
@@ -39,6 +38,16 @@ typedef struct {
 } HARDWARE_INFO_HEADER;
 #pragma pack()
 
+//
+// used by:
+//  - HardwareInfoTypeQemuUefiVars
+//
+#pragma pack(1)
+typedef struct {
+  UINT64    MmioAddress;
+} SIMPLE_INFO;
+#pragma pack()
+
 //
 // Generic data structure to access any supported hardware type
 // resource definition
@@ -50,6 +59,7 @@ typedef struct {
   union {
     UINT8               *Raw;
     HOST_BRIDGE_INFO    *PciHostBridge;
+    SIMPLE_INFO         *SimpleDevice;
   } Data;
 } HARDWARE_INFO;
 #pragma pack()