diff --git a/MdePkg/Include/Library/PeiCoreEntryPoint.h b/MdePkg/Include/Library/PeiCoreEntryPoint.h
index 6d52445059..ed427a6dd2 100644
--- a/MdePkg/Include/Library/PeiCoreEntryPoint.h
+++ b/MdePkg/Include/Library/PeiCoreEntryPoint.h
@@ -81,7 +81,8 @@ EfiMain (
 /**
   Call constructs for all libraries. Automatics Generated by tool.
 
-  @param  FfsHeader   Pointer to header of FFS.
+  @param  FileHandle  Handle of the file being invoked. 
+                      Type EFI_PEI_FILE_HANDLE is defined in FfsFindNextFile().
   @param  PeiServices Pointer to the PEI Services Table.
 
 **/