diff --git a/MdeModulePkg/Library/BootManagerLib/BootManager.c b/MdeModulePkg/Library/BootManagerLib/BootManager.c
index cfeedebc88..dd87250743 100644
--- a/MdeModulePkg/Library/BootManagerLib/BootManager.c
+++ b/MdeModulePkg/Library/BootManagerLib/BootManager.c
@@ -327,6 +327,9 @@ GroupMultipleLegacyBootOption4SameType (
   SetMem (DeviceTypeIndex, sizeof (DeviceTypeIndex), 0xff);
 
   GetEfiGlobalVariable2 (L"BootOrder", (VOID **) &BootOrder, &BootOrderSize);
+  if (BootOrder == NULL) {
+    return;
+  }
 
   for (Index = 0; Index < BootOrderSize / sizeof (UINT16); Index++) {
     UnicodeSPrint (OptionName, sizeof (OptionName), L"Boot%04x", BootOrder[Index]);