diff --git a/MdePkg/Include/Ppi/MpServices.h b/MdePkg/Include/Ppi/MpServices.h
index a96baf7f55..2c21d6469d 100644
--- a/MdePkg/Include/Ppi/MpServices.h
+++ b/MdePkg/Include/Ppi/MpServices.h
@@ -242,7 +242,7 @@ EFI_STATUS
   );
 
 /**
-  Enable or disable an application processor.
+  Identify the currently executing processor.
 
   @param[in]  PeiServices         An indirect pointer to the PEI Services Table
                                   published by the PEI Foundation.