diff --git a/mswin32/winpcap/Upgrading-Instructions.txt b/mswin32/winpcap/Upgrading-Instructions.txt
index 73144fc16..be72e9f5e 100644
--- a/mswin32/winpcap/Upgrading-Instructions.txt
+++ b/mswin32/winpcap/Upgrading-Instructions.txt
@@ -7,7 +7,9 @@ How to upgrade Nmap to a new WinPcap release (2009)
 2) Update the LICENSE file, if necessary. I couldn't find a plain
    WinPcap license file anywhere. There's an HTML version at
    http://www.winpcap.org/misc/copyright.htm. You can copy and paste
-   the license text from the installer into the LICENSE file.
+   the license text from the installer into the LICENSE file which should
+   be saved as PC file format (not UNIX) and ANSI encoding (not UTF-8).
+
 
 3) Extract all the files from the setup file using 7-Zip
    (http://www.7-zip.org/). Enter the $SYSDIR subdirectory. One by one,