1 files changed, 2 insertions, 0 deletions
diff --git a/MdePkg/Include/Uefi/UefiSpec.h b/MdePkg/Include/Uefi/UefiSpec.h
index d837d385c2..ba0d84c819 100644
--- a/MdePkg/Include/Uefi/UefiSpec.h
+++ b/MdePkg/Include/Uefi/UefiSpec.h
@@ -1148,6 +1148,8 @@ EFI_STATUS
   @retval EFI_OUT_OF_RESOURCES  There was not enough memory in pool to install all the protocols.
   @retval EFI_ALREADY_STARTED   A Device Path Protocol instance was passed in that is already present in
                                 the handle database.
+  @retval EFI_INVALID_PARAMETER Handle is NULL.
+  @retval EFI_INVALID_PARAMETER Protocol is already installed on the handle specified by Handle.
 
 **/
 typedef