diff --git a/MdePkg/Include/Library/PeimEntryPoint.h b/MdePkg/Include/Library/PeimEntryPoint.h
index 81c78afbf9..e5dcd4c12b 100644
--- a/MdePkg/Include/Library/PeimEntryPoint.h
+++ b/MdePkg/Include/Library/PeimEntryPoint.h
@@ -24,8 +24,9 @@ extern CONST UINT32       _gPeimRevision;
 /**
   Image entry point of Peim.
 
-  @param  FfsHeader   Pointer to FFS header the loaded driver.
-  @param  PeiServices Pointer to the PEI services.
+  @param  FileHandle  Handle of the file being invoked. 
+                      Type EFI_PEI_FILE_HANDLE is defined in FfsFindNextFile().
+  @param  PeiServices Describes the list of possible PEI Services.
 
   @return  Status returned by entry points of Peims.
 
@@ -41,8 +42,9 @@ _ModuleEntryPoint (
 /**
   Wrapper of Peim image entry point.
 
-  @param  FfsHeader   Pointer to FFS header the loaded driver.
-  @param  PeiServices Pointer to the PEI services.
+  @param  FileHandle  Handle of the file being invoked. 
+                      Type EFI_PEI_FILE_HANDLE is defined in FfsFindNextFile().
+  @param  PeiServices Describes the list of possible PEI Services.
 
   @return  Status returned by entry points of Peims.
 
@@ -58,8 +60,9 @@ EfiMain (
 /**
   Call constructs for all libraries. Automatics Generated by tool.
 
-  @param  FfsHeader   Pointer to FFS header the loaded driver.
-  @param  PeiServices Pointer to the PEI services.
+  @param  FileHandle  Handle of the file being invoked. 
+                      Type EFI_PEI_FILE_HANDLE is defined in FfsFindNextFile().
+  @param  PeiServices Describes the list of possible PEI Services.
 
 **/
 VOID
@@ -73,8 +76,9 @@ ProcessLibraryConstructorList (
 /**
   Call destructors for all libraries. Automatics Generated by tool.
 
-  @param  FfsHeader   Pointer to FFS header the loaded driver.
-  @param  PeiServices Pointer to the PEI services.
+  @param  FileHandle  Handle of the file being invoked. 
+                      Type EFI_PEI_FILE_HANDLE is defined in FfsFindNextFile().
+  @param  PeiServices Describes the list of possible PEI Services.
 
 **/
 VOID
@@ -88,8 +92,9 @@ ProcessLibraryDestructorList (
 /**
   Call the list of driver entry points. Automatics Generated by tool.
 
-  @param  FfsHeader   Pointer to FFS header the loaded driver.
-  @param  PeiServices Pointer to the PEI services.
+  @param  FileHandle  Handle of the file being invoked. 
+                      Type EFI_PEI_FILE_HANDLE is defined in FfsFindNextFile().
+  @param  PeiServices Describes the list of possible PEI Services.
 
   @return Status returned by entry points of drivers.