diff --git a/MdeModulePkg/Universal/CapsuleRuntimeDxe/CapsuleRuntimeDxe.inf b/MdeModulePkg/Universal/CapsuleRuntimeDxe/CapsuleRuntimeDxe.inf
index 2ab29ba339..075428ecec 100644
--- a/MdeModulePkg/Universal/CapsuleRuntimeDxe/CapsuleRuntimeDxe.inf
+++ b/MdeModulePkg/Universal/CapsuleRuntimeDxe/CapsuleRuntimeDxe.inf
@@ -26,6 +26,8 @@
 
 #
 # The following information is for reference only and not required by the build tools.
+# For IPF arch, Capsule services can aslo work well on boot time and run time.
+# However, when OS enters into pysical mode such MCA path, Capsule services can't be used.
 #
 #  VALID_ARCHITECTURES           = IA32 X64 IPF EBC
 #