diff --git a/CorebootModulePkg/CbSupportDxe/CbSupportDxe.c b/CorebootModulePkg/CbSupportDxe/CbSupportDxe.c
index 8419c9d481..68baad6d00 100755
--- a/CorebootModulePkg/CbSupportDxe/CbSupportDxe.c
+++ b/CorebootModulePkg/CbSupportDxe/CbSupportDxe.c
@@ -123,6 +123,7 @@ OnReadyToBoot (
 
 **/
 EFI_STATUS
+EFIAPI
 CbDxeEntryPoint (
   IN EFI_HANDLE         ImageHandle,
   IN EFI_SYSTEM_TABLE   *SystemTable