diff --git a/SecurityPkg/Library/Tpm12DeviceLibDTpm/Tpm12Tis.c b/SecurityPkg/Library/Tpm12DeviceLibDTpm/Tpm12Tis.c
index 51f4359128..d2b79a2740 100644
--- a/SecurityPkg/Library/Tpm12DeviceLibDTpm/Tpm12Tis.c
+++ b/SecurityPkg/Library/Tpm12DeviceLibDTpm/Tpm12Tis.c
@@ -91,7 +91,11 @@ Tpm12GetPtpInterface (
     return PtpInterfaceFifo;
   }
 
-  return PtpInterfaceTis;
+  if (InterfaceId.Bits.InterfaceType == PTP_INTERFACE_IDENTIFIER_INTERFACE_TYPE_TIS) {
+    return PtpInterfaceTis;
+  }
+
+  return PtpInterfaceMax;
 }
 
 /**