diff --git a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyPci.c b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyPci.c
index 5b1117eb1b..62d0feed3c 100644
--- a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyPci.c
+++ b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyPci.c
@@ -2942,7 +2942,7 @@ LegacyBiosInstallPciRom (
     Pcir = (PCI_3_0_DATA_STRUCTURE *)
            ((UINT8 *) LocalRomImage + ((PCI_EXPANSION_ROM_HEADER *) LocalRomImage)->PcirOffset);
 
-    if (Pcir->Signature != PCI_DATA_STRUCTURE_SIGNATURE) {
+    if ((Pcir->Signature != PCI_DATA_STRUCTURE_SIGNATURE) || (Pcir->CodeType != PCI_CODE_TYPE_PCAT_IMAGE)) {
       mVgaInstallationInProgress = FALSE;
       return EFI_UNSUPPORTED;
     }