diff --git a/MdeModulePkg/Include/Guid/MmCommBuffer.h b/MdeModulePkg/Include/Guid/MmCommBuffer.h
index df4ea317eb..e3484e0bb9 100644
--- a/MdeModulePkg/Include/Guid/MmCommBuffer.h
+++ b/MdeModulePkg/Include/Guid/MmCommBuffer.h
@@ -47,6 +47,9 @@ typedef struct {
   ///
   BOOLEAN    IsCommBufferValid;
 
+  /// For padding purpose
+  UINT8      Reserved[7];
+
   ///
   /// The return status when returning from MM to non-MM.
   ///