diff --git a/MdePkg/Include/Protocol/HiiConfigAccess.h b/MdePkg/Include/Protocol/HiiConfigAccess.h
index 3baf91e07b..fbee7c52b0 100644
--- a/MdePkg/Include/Protocol/HiiConfigAccess.h
+++ b/MdePkg/Include/Protocol/HiiConfigAccess.h
@@ -102,9 +102,16 @@ typedef UINTN EFI_BROWSER_ACTION;
                                   string.
 
   @retval EFI_INVALID_PARAMETER   Unknown name. Progress points
-                                  to the & before the name in
+                                  to the "&" before the name in
                                   question.
 
+  @retval EFI_INVALID_PARAMETER   If Results or Progress is NULL.
+
+  @retval EFI_ACCESS_DENIED       The action violated a system policy.
+
+  @retval EFI_DEVICE_ERROR        Failed to extract the current configuration
+                                  for one or more named elements.
+
 **/
 typedef
 EFI_STATUS