diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec
index 0c18e1decd..bf94549cbf 100644
--- a/MdePkg/MdePkg.dec
+++ b/MdePkg/MdePkg.dec
@@ -2413,6 +2413,8 @@
   # previous stage has feature enabled and user wants to disable it.
   # BIT 1 = Supervisor Time Compare (Sstc). This bit is relevant only if
   # previous stage has feature enabled and user wants to disable it.
+  # BIT 2 = Page-Based Memory Types (Pbmt). This bit is relevant only if
+  # previous stage has feature enabled and user wants to disable it.
   #
   gEfiMdePkgTokenSpaceGuid.PcdRiscVFeatureOverride|0xFFFFFFFFFFFFFFFF|UINT64|0x69