diff --git a/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c b/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
index 6be26191cf..2f3f929ea9 100644
--- a/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
+++ b/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
@@ -245,6 +245,8 @@ DxeMain (
   EFI_VECTOR_HANDOFF_INFO         *VectorInfoList;
   EFI_VECTOR_HANDOFF_INFO         *VectorInfo;
 
+  gRing3Data = NULL;
+  
   //
   // Setup Stack Guard
   //