diff --git a/README b/README
index 6eca9f5..5a97ed1 100644
--- a/README
+++ b/README
@@ -21,7 +21,9 @@ Then the program won't run because it tries to import Sleep@4 from kernel32
 
 This tool can help you change the import name Sleep@4 to Sleep,
 while the linking name keeps Sleep@4. Just open the import library and
-change the 
+change the import type to undecorate, save it.
+
+NOTICE: IT CAN ONLY MODIFY THE .LIB GENERATED BY LIB.EXE OR LINK.EXE /LIB.
 
 If you need targeted .net FW 2.0 but doesn't have the toolset.
 you may use ildasm to convert the CoreInterfaces.dll into .il,