diff --git a/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigImpl.c b/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigImpl.c
index c511bf9365..9e551da945 100644
--- a/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigImpl.c
+++ b/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigImpl.c
@@ -2507,7 +2507,7 @@ UpdateDeletePage (
       //
       // GuidToString (&Cert->SignatureOwner, GuidStr, 100);   
       UINTN size = 100;
-      X509GetCommonName((UINT8*)Cert->SignatureData, (UINTN)CertList->SignatureSize, (UINT8*)GuidStr, &size);
+      X509GetCommonName((UINT8*)Cert->SignatureData, (UINTN)CertList->SignatureSize, (CHAR8*)GuidStr, &size);
 
       GuidID  = HiiSetString (PrivateData->HiiHandle, 0, GuidStr, NULL);
       HiiCreateCheckBoxOpCode (