diff --git a/Library/OcSmbiosLib/SmbiosPatch.c b/Library/OcSmbiosLib/SmbiosPatch.c
index 83a047b7..9d008925 100755
--- a/Library/OcSmbiosLib/SmbiosPatch.c
+++ b/Library/OcSmbiosLib/SmbiosPatch.c
@@ -2126,7 +2126,7 @@ OcSmbiosExtractOemInfo (
       &gAppleVendorVariableGuid,
       NULL,
       &TmpSize,
-      Mlb
+      Rom
       );
     if (!EFI_ERROR (Status) && TmpSize != OC_OEM_ROM_MAX) {
       ZeroMem (Rom, OC_OEM_ROM_MAX);