diff --git a/mswin32/winpcap/Upgrading-Instructions.txt b/mswin32/winpcap/Upgrading-Instructions.txt
index f2cce4a2d..beb8acf65 100644
--- a/mswin32/winpcap/Upgrading-Instructions.txt
+++ b/mswin32/winpcap/Upgrading-Instructions.txt
@@ -7,6 +7,11 @@ How to upgrade Nmap to a new WinPcap release (2007)
 2) Remove all instances of WinPcap (through Add/Remove Programs), then
    install the new version.
 
+   2a) 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.
+
 3) Copy the installed files into the mswin32/winpcap directory. The
    installed files at time of writing are