diff --git a/MdeModulePkg/Library/BootMaintenanceManagerUiLib/BootMaintenanceManager.h b/MdeModulePkg/Library/BootMaintenanceManagerUiLib/BootMaintenanceManager.h
index 2c93446a05..d60731431e 100644
--- a/MdeModulePkg/Library/BootMaintenanceManagerUiLib/BootMaintenanceManager.h
+++ b/MdeModulePkg/Library/BootMaintenanceManagerUiLib/BootMaintenanceManager.h
@@ -1305,6 +1305,7 @@ BootMaintCallback (
 
 **/
 BOOLEAN 
+EFIAPI
 CreateBootOptionFromFile (
   IN EFI_DEVICE_PATH_PROTOCOL    *FilePath
   );
@@ -1318,6 +1319,7 @@ CreateBootOptionFromFile (
   @retval FALSE  Not exit caller function.
 **/
 BOOLEAN 
+EFIAPI
 CreateDriverOptionFromFile (
   IN EFI_DEVICE_PATH_PROTOCOL    *FilePath
   );
@@ -1332,6 +1334,7 @@ CreateDriverOptionFromFile (
   
 **/
 BOOLEAN 
+EFIAPI
 BootFromFile (
   IN EFI_DEVICE_PATH_PROTOCOL    *FilePath
   );
diff --git a/MdeModulePkg/Library/BootMaintenanceManagerUiLib/BootOption.c b/MdeModulePkg/Library/BootMaintenanceManagerUiLib/BootOption.c
index 0bd3170872..7a014c911b 100644
--- a/MdeModulePkg/Library/BootMaintenanceManagerUiLib/BootOption.c
+++ b/MdeModulePkg/Library/BootMaintenanceManagerUiLib/BootOption.c
@@ -857,6 +857,7 @@ GetDriverOrder (
   @retval FALSE  Not exit caller function.
 **/
 BOOLEAN 
+EFIAPI
 BootFromFile (
   IN EFI_DEVICE_PATH_PROTOCOL    *FilePath
   )
@@ -929,6 +930,7 @@ ReSendForm(
   @retval FALSE  Not exit caller function.
 **/
 BOOLEAN 
+EFIAPI
 CreateBootOptionFromFile (
   IN EFI_DEVICE_PATH_PROTOCOL    *FilePath
   )
@@ -946,6 +948,7 @@ CreateBootOptionFromFile (
 
 **/
 BOOLEAN 
+EFIAPI
 CreateDriverOptionFromFile (
   IN EFI_DEVICE_PATH_PROTOCOL    *FilePath
   )