diff --git a/system/pipemeter/pipemeter.SlackBuild b/system/pipemeter/pipemeter.SlackBuild
index fb9bb49828..d9e339fe12 100644
--- a/system/pipemeter/pipemeter.SlackBuild
+++ b/system/pipemeter/pipemeter.SlackBuild
@@ -4,6 +4,8 @@
 
 # Written by B. Watson (yalhcru@gmail.com)
 
+# Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.
+
 PRGNAM=pipemeter
 VERSION=${VERSION:-1.1.3}
 BUILD=${BUILD:-1}